I think an alliance/coalition between Hammerfell,Skyrim,Cyrodiil and High rock could easily come about and it would beat the Dominion. I doubt the Argonians care enough to get involved unless they are directly attacked. Stormcloaks winning pretty much dooms the current empire as it is but as has been the case in the past with Tamriel, the death of one empire is always followed sooner or later by the birth and rise of a new empire. Our dragonborn is amongst the best canidates for the job as well.
Deep into that darkness peering, long I stood there, wondering, fearing, doubting, dreaming.