We have many years ahead to see what Keller will help Intel make, so stay calm for now.
As for the facts that led me to my previous assumption are:
1) Zen core
designed by Keller managed to greatly closed the gap to Intel's arch in a single gen.
2) Keller has done the same thing in the past with another AMD arch and helped them to even surpass Intel back then in its finest iteration later.
3) Intel's arch is stagnated for many years now with no signs at all that this is about to change soon enough to make them leapfrog AMD again if Zen 2 surpass them which isn't impossible imho (history to be repeated again maybe?).
The
facts mentioned above seem enough for Intel to sign the cpu arch "magician" me thinks.