After leaking out to the web, a text dump file shows many features that Battlefield 4 will have. Though this list is most likely far from finalized (these are just alpha files), it does show off some of the weapons, optics, vehicles, and equipment we can look forward to. A small bonus on at the end that you'll only find here.
Seems flashbangs will be making a return since they went missing the past few Battlefield titles. You can look through the objects here. Enjoy!
//Weapons
ak5c
cz805
hawk
m82a3 (has bipod, maybe mid-range scope)
m9
p90
qbz951
qsz92
rfb
scorpion
scoutelite
sv98
type88
ultimax
famas
m249
m40a5
remington870
ump
//Equipment, launchers, & grenades
starstreak
portablesoflam
nlaw
starstreak_projectile_op_homing
fgm148 (Javelin)
m15 (usually smokegrenade)
m34 (White Phosphorus Smoke Grenade)
battlepickup_m82_mediumrange //40MM
battlepickup_mgl //40MM
25mmairburstgrenade
25mmairburstsmoke
fx_flashbang
fx_grenade_25mm_airburst
fx_grenade_25mm_smokegrenade
fx_grenade_frag_01
fx_wp_incendiarygrenade_m
//Ammo
12g_buckshot
12g_dbd09
12g_dbd09_flechette
12g_flechette
12g_frag_pump
12g_slug_pump
50cal_bolt
u_qbz951_40mm_flash
u_qbz951_40mm_he
u_qbz951_40mm_lvg
u_qbz951_40mm_shg
u_qbz951_40mm_smk
u_qbz951_m320_flash
u_qbz951_m320_he
u_qbz951_m320_lvg
u_qbz951_m320_shg
u_qbz951_m320_smk
//Accessories
accessory
barrel
foregrip
optics
quadrail
reticles
scopeglint
sightrail
sightrail2
//Optics
acog
chinese6x
compact4x
coyotee
deltapoint (reflex sight)
irnv
pka-s
pso-1
rifle_scope
rx01 (reddot)
scorpion_generalsight
sniperscopezoom
utas_generalsight
visionking
1x
20x
3x
40x
4x
6x
8x
ugl
//Specializations
ammoboostl1
explosiveboostl1
explosiveresistl1
grenadeboostl1
healspeedboostl1
sprintboostl1
squadsharing
suppressionboostl1
suppressionresistl1
//Persistence
ch
ru
us
//Vehicles
ac130
ah1z (Cobra)
centurion_c-ram (R2D2 AA)
ch_ahe_z-10w
ch_fac_dv15 (Chinese patrol boat?)
ch_lthe_z-9 (Chinese transport helo)
ch_mbt_type99 (MBT)
ch_mrap-zfb-05 (Chinese car)
fac_missile_platform
humveearmored (Humvee is back?)
lav25
m1a2 (MBT)
norinco_lrcws (Norinco is Chinese company)
pantsir (Russian AA -missile truck)
pwc_jetski
radarsweep (UAV?)
tomahawk
us_fac-cb90 (US patrol boat)
us_mrap-cougar (Car in E3 Alpha)
vehicleprojectileshield
venom
bradley
t90
tunguska
//Vehicle weapon data
land_heatseeking_missile_locking
mbt_apfsds_firing (AT Arrow)
mbt_canister_firing
mbt_cannon_firing (Normal AP shell)
mbt_he_shell_firing
rocketairburst_projectile
tank_ironfist_firing (Iron Fist, destroyes e.g. RPG's mid-air)
//Vehicle unlocks
aavactiveradarrockets
aavairburstrockets
aavairradar
aavbrassgraphitelaunchers
aavenvgoptics
aavheatseekingmissiles
aavirnvoptics
aavironfistlaunchers
aavmissiles
aavproximityscan
aavreactivearmor
aavregenupgrade
aavreloadupgrade
aavsmokelaunchers
aavstealth
aavzoomoptics
atkheliairradar
atkheliautopilot
atkhelibelowradar
atkheliecmjammer
atkhelienvgoptics
atkheliextinguisher
atkheliflarelauncher
atkheliheatseekermissile
atkhelihellfiremissile
atkhelihydrarockets
atkheliirnvoptics
atkhelikitheatseeking
atkhelikithellfire
atkhelilaserdesignator
atkheliproximityscan
atkheliproximityscandummy
atkheliproximityscangunner
atkheliregenupgrade
atkheliregenupgradedummy
atkheliregenupgradegunner
atkhelireloadupgradegunner
atkhelireloadupgradepilot
atkhelirocketguidance
atkhelistealth
atkhelistealthdummyunlock
atkhelistealthgunner
atkhelitow
atkhelitvguidedmissile
atkhelizoomoptics
atkhelizunirockets
atkjetautopilot
atkjetecmjammerpod
atkjetfireextinguisher
atkjetflarelauncher
atkjetheatseekerstance
atkjetmaincannon
atkjetmaverickmissiles
atkjetproximityscan
atkjetreload
atkjetrocketstance
atkjetstealth
atkjettvguidedmissile
facaamissile
facairburst
facairradar
facatgm
facautoloader
facbrassgraphitelaunchers
facburstshell
facenvgoptics
facextinguisher
facheatshell
facirnvoptics
facironfistlaunchers
faclaserguidedmissile
facmaincannon
facmaintenancetoolbox
facproximityscanner
facreactivearmor
facsmokelaunchers
facthermalcoating
factvguidedmissile
faczoomoptics
ifvairburst
ifvapfsds-t
ifvbrassgraphitelaunchers
ifvcoax
ifvenvgoptics
ifvextinguisher
ifvflechettecanister
ifvgunnerammofeeder
ifvgunnerflir
ifvgunnerirnv
ifvgunnerproximityscanner
ifvgunnersoflam
ifvgunnerwpsmoke
ifvgunnerzoom
ifvirnvoptics
ifvironfistlaunchers
ifvmaincannon
ifvreactivearmor
ifvregenupgrade
ifvreloadupgrade
ifvsmokelaunchers
ifvstealth
ifvtow
ifvzoomoptics
jet25mmcannon
jet30mmcannon
jetactiveradarmissiles
jetautopilot
jetecmjammerpod
jetfireextinguisher
jetflarelauncher
jetguidedhomingmissiles
jetheatseekerstance
jetmaincannon
jetmaverickmissiles
jetproximityscan
jetreload
jetstealth
mbtapfsdscannon
mbtatgmshell
mbtbrassgraphitelaunchers
mbtcanistershell
mbtcoaxhmg
mbtcoaxlmg
mbtenvgoptics
mbtextinguisher
mbtgunnerammofeeder
mbtgunnerflir
mbtgunnerirnv
mbtgunnerproximityscanner
mbtgunnersoflam
mbtgunnerwpsmoke
mbtgunnerzoom
mbtheshell
mbtirnvoptics
mbtironfistlaunchers
mbtkitunlock1
mbtkitunlock2
mbtkitunlock3
mbtkitunlock4
mbtkitunlock5
mbtkitunlock6
mbtkitunlock7
mbtkitunlock8
mbtkitunlock9
mbtmaincannon
mbtproximityscan
mbtreactivearmor
mbtregenupgrade
mbtreloadupgrade1
mbtsmokelaunchers
mbtstealth
mbtzoomoptics
nopassive
nopilotstance
scoutaamissile
scoutatgmissile
scoutautocannon
scoutautopilot
scoutecmjammer
scoutextinguisher
scoutflares
scoutheliairradar
scoutmaingun
scoutscan
scoutstealth
//Soldier camos
civ_pattern05
oceanic
oceanic02
pla02
pla_desert
pla_naval
pla_temperate
ru_izom
ru_partizan_01
urbanairborne
us_acupat
us_urban01
//Various sound files
aa_locked_handheld_wave
aa_locked_vehicle
aa_tracking_growler_vehicle_wave
2.160 aa_tracking_handheld_wave
2.160 at_locked_handheld_wave
2.112 at_tracking_beep_handheld_wave
2.128 missile_locked_jet_wave
2.112 missile_locked_vehicle_wave
2.112 missile_tracking_vehicle_wave
//Modes
mp_npx_conquest_prefab
mp_npx_domination_prefab
mp_npx_elimination_prefab
mp_npx_obliteration_prefab
mp_npx_playground_prefab
mp_npx_rush_prefab
mp_npx_sdm_prefab
mp_npx_tdm_prefab
//Profile options
992 audiolanguage
784 calibrationdone
880 minimaptextureopacity
1.056 minimaptype
880 minimapzoomwhenmapislarge
880 minimapzoomwhenmapissmall
784 optionaimassist
1.136 optionairbuttons
1.136 optionairsticks
1.088 optionambientocclusion2
864 optionanimationquality
1.088 optionanisotropicfilter2
1.104 optionantialiasingdeferred
1.120 optionantialiasingpost
864 optionbrightness
768 optioncarradio
1.072 optionchatlog
1.104 optioncolorblind
784 optionconsoleantialias
848 optioncontrast
784 optioncrouchtoggle
848 optiondeadzone
864 optiondialogevolume
1.120 optioneffectsquality
784 optionenablesubtitles
784 optionenlighten
864 optionfieldofview
800 optionfullscreenenabled
864 optionfullscreenscreen
784 optionhintsystem
784 optionholdbuttontozoom
800 optionholdforbreathcontrol
848 optionhudscale
864 optionhudscalegen3
864 optionhudscalegen4
1.056 optioninputmethod
784 optionisrighthanded
1.136 optionjetbuttons
1.136 optionjetsticks
768 optionkilllog
864 optionmeshquality
1.120 optionmeshquality2
864 optionmotionblur
800 optionmotionblurenabled
784 optionmouserawinput
864 optionmousesensitivity
880 optionmousesensitivityvehicle
864 optionmusicvolume
1.200 optionoverallgraphicsquality
864 optionphysicsquality
784 optionreloadhint
864 optionresolutionheight
864 optionresolutionhertz
864 optionresolutionwidth
800 optionscheme0flipcameray
784 optionscheme0flipy
880 optionscheme0sensitivity
800 optionscheme1flipcameray
784 optionscheme1flipy
880 optionscheme1sensitivity
800 optionscheme2flipcameray
784 optionscheme2flipy
880 optionscheme2sensitivity
800 optionscheme3flipcameray
784 optionscheme3flipy
880 optionscreensafeareaheight
880 optionscreensafeareawidth
864 optionselectedkit
848 optionserverbrowserfavorites
848 optionserverbrowserfilter
848 optionserverbrowserhistory
864 optionserverexpired
864 optionserverexpiring
784 optionserverrented
864 optionshaderquality
1.120 optionshadowquality
784 optionshowbattledash
800 optionskeletontrackingon
1.136 optionsoldierbuttons
1.136 optionsoldiersticks
1.024 optionsoundquality
864 optionsoundsystemsize
1.024 optionspeechrecognitiondialect
800 optionspeechrecognitionenabled
784 optionsprinthold
880 optionstereoconvergence
784 optionstereomode
784 optionstereoscopy
1.120 optionterrainquality
1.120 optiontexturequality
832 optiontrackaward0
832 optiontrackaward1
800 optiontransparentshadows
1.120 optionundergrowthquality
880 optionuserfrequencyfactor
1.136 optionvehiclebuttons
1.136 optionvehiclesticks
784 optionvibration
768 optionvoipon
1.264 optionvolanguage
848 optionvolume
768 optionvsync
1.168 optionyoursoundsystem
784 optionzoomtoggle
4.640 profileoptions
768 vsyncenable
POTENTIAL SPOILERS!
POTENTIAL SPOILERS!
POTENTIAL SPOILERS!
//E3 Client data
{ 'Levels/SP/SP_Airfield/SP_Airfield', { 'Ocean', 'Beach_Landing', 'Park_Area', 'Office_Complex_flankers', 'Traffic_Bridge'} },
{ 'Levels/SP/SP_Dam/SP_Dam', { "Level_Start","DamA_CityEntryEncounter","DamA_OuterCityReachEncounter","DamA_InnerCityReachEncounter","DamA_BridgeVistaScene","DamA_BridgeBattleEncounter","DamA_GetToEncampmentScene","DamB_MotorbikeRide","DamB_InfiltrateDam","DamB_InsideDam","DamB_DamBombPlacement","DamB_DamEscape","DamB_MudSlide","DamC_WashedUpEncounter","DamC_SquadRegroupScene","DamC_FloodedCityEncounter","DamC_RetakingTeAirfieldEncounter","DamC_LeavingTheCity"} },
{ 'Levels/SP/SP_Shanghai/SP_Shanghai', { } },
{ 'Levels/SP/SP_Prison/SP_Prison', {"A:_Torture_Scene","A:_Prison_Introduction","A:_Knife_Fight_Scene","A:_Dima_Walkthrough","A:_Gear_Up_Encounter","A:_Maintenance_Area_Encounter","A:_Cut_the_Power_Event","A:_Manual_Lock_Encounter","A:_Molotov_Encounter","B:_Prisoner_processing_room","A:_Return_to_Cellblock","B:_monitor_room","A:_Bohai_Assault","B:_torture_hallway","B:_empty_torture_hallway","B:_reception_tear_gas","B:_kitchen_explosion","B:_hanna_&_irish_torture_hall","B:_ventilation_exit","C:_Kitchen_Exit","C:_rappel_scene","C:_the_slide","C:_Helipad_reach","C:_tram_attack","C:_tram_defend","C:_Tram_Descent","C:_Tram_Crash"} },
{ 'Levels/SP/SP_Naval/SP_Naval', {"Level_Start","NavalA_MedBay","NavalA_IrishMeeting","NavalA_GarrisonBriefing","NavalA_RHIB_Entry","NavalB_TitanEntryPoint","NavalB_SwimmingTutorial","NavalB_SurvivorsScene","NavalB_FloodedCorridor","NavalB_PRE_TiltedHangar","NavalB_POST_TiltedHangar","NavalB_HullScene","NavalB_IntelRoomScene","NavalB_IntelEncounter","NavalB_HullBreachEncounter","NavalC_Battle_TitanFlightDeckEncounterOne","NavalC_Battle_SeaBattle","NavalC_WellDeckEncounter","NavalC_MidDeckEncounter","NavalC_FlightDeckEncounterOne","NavalC_BridgeScene"} },
{ 'Levels/SP/SP_Prologue/SP_Prologue', {"Level_Start","Movement_Tutorial","Safe_House_scene","School_Cafeteria_Encounter","School_Encounter","Tank_Escape_Scene","Suppressor_Fight","construction_site_encounter_1","construction_site_encounter_2","Extractionpoint_B_run","Extractionpoint_B_collapse","Civilian_Scene","Car_Ride","Heli_Crash","Car_Scene_Full","End_Scene","Demo_Start","Demo_Movement_Tutorial","Demo_Safe_House_Scene","Demo_Suppressor_Fight","Demo_construction_site_encounter_1","Demo_construction_site_encounter_2","Demo_Extractionpoint_B_run","Demo_Extractionpoint_B_collapse","Demo_Civilian_Scene","Demo_Car_Ride","Demo_Heli_Crash"}},