Nvidia has taken Crysis 2 off of the list of DX11 capable games.
There has been no official statement saying Crysis 2 will even get patched to DX11. A few devs hinted at a patch after release supplying the game with more graphics features for the PC, but none of those were official statements. And the statements/interviews I've been able to find on the matter either say nothing about DX11 or try to beat around the bush.
Crytek has been dead silent on the issue.
We have absolutely no proof the Cryengine 3 can actually do DX11. All we have are ages old statements from Crytek saying Crysis 2 will push PC's to their limit and be the best looking game period. Obviously those were lies. Lies by the CEO I might add. So that gives me no reason to think DX10/11 was ever even considered when it came to Crysis 2 and the Cryengine 3.
If Crytek is willing to lie in direct statements made by the CEO, there's absolutely no way we can even think of trusting something they won't even comment on.