I, for one, am very skeptical about this. First, why would they remove the NVLink capability? It was already only present on the 3090 to begin with, the 3080 didn't have it and the 3080 Ti followed suit. The 21 Gbps claim also seems to be on the verge of exaggeration - the 3090 already shipped with 21 Gbps memory modules, being higher spec than the 19 Gbps bin used on the 3080 (and since then, the 3070 Ti and 3080 Ti as well). 21 Gbps is the wall of memory speed for the GA102, my card can do a grand total of ~21.5 Gbps before it carks and the graphics begin to scramble, meaning that this eventual SUPER variant would have absolutely zero memory overclocking headroom. Then there's the yield, full GA102 dies with all 84 SMs enabled are significantly more difficult to get, and the much more expensive A6000 demands them already.
400W of reference board power? I think they stuck to 350 on the 3090 for a reason... (heat, if anyone's wondering), and there's the other thing. This SKU would undoubtedly be LHR, too, which means the miners would simply coop up all of the remaining vanilla 3090 stock, making its price balloon even higher and this card, relegated to a strictly gaming processor, unable to satisfy the demands of the extreme enthusiasts who still want to play around with multi-GPU rendering (as it lacks the NVLink port) and devoid of any workstation features or particularly endowed niche compute capabilities (i.e. FP64) - would then remain utterly overpriced in a niche so isolated, that it'd make the Titan V and the Titan RTX look like they were intended for the common guy.
Besides, let's take an objective look at the rest of the stack. Where are they going to add SUPER variants of other cards? They won't. The GA104 is already maxed out in the 3070 Ti, the 3080 is an amazing SKU for them to dump highly defective GA102 dies (given it has only 68 out of 84 units enabled), the 3070 already satisfies its segment and the 3060 Ti is already within 15% of it fulfilling the slot right below... the highest SM count difference remaining is between 3080 (68) and the 3080 Ti (80), a 3080 Super could be released with say, 72 or 74 SM, but that would have to be priced lower than the Ti, would basically cannibalize two SKUs, have zero market sense...
I'm prepared to call the Ampere stack finished, myself.