damn i sure was hoping to get a glimpse of the chimer and maybe have them as a playable class. so at this point the tribunal are in the fullest power. and the dwemer are already gone?
I don't remember if this was unofficial fanon or canon but there was a group of Chimer that diverged from the original Chimer prior to Azuras curse and lived on an island between Tamriel and Akavir and were found by Reman and his forces when he attempted to invade Akavir.
As for the Dunmer? As people have said they will have been Dunmer for awhile by this point.
As for Timeframes? It has been 200 years since Oblivion at the time of Skyrim. All the other games in the main series occurred within the 40-50 or so years prior to Oblivion. TESO is set about 800 years before Morrowind or Oblivion and 1000 years prior to Skyrim. The time frame is about 2E 560 or so I believe. Something like that.