User blog comment:Jimeee/Bethesda tweets mysterious teaser picture.../@comment-93.136.165.235-20121103115617

The mask looks like a falmer mask to me. Knight-Paladin Gelebor, in Dawnguard, mentions that the Falmer are becoming more intelligent, and if a line of communication could be established, relations could improve.

There is speculation that the Snow Elf will eventually become a surface-dwelling race once again as there have been reports of more and more organized surface raids of Falmer attacking cattle and crops for food. Ursa Uthrax, the author of The Falmer: A Study writes, "I fear a horror neither man nor gods could possibly stand against."

It is also speculated that the toxin was merely a supressant that devolved the once great race, and since the Falmer would no longer need to ingest the toxin, they might, over generations, re-evolve back into snow elves since the evolutionary status of the falmer is no longer being supressed by the toxin.