Valenwood with the Altmer pact could be an ally to the new Empire (with the trade and what not). Or Argonia and Elswyer taking over Morrowind.
Just saying... :shrug:
The altmer don't really like humanity (or anyone not altmer in reality). If they're trying to bring back the Aldmeri Domain, expect the altmer to not even be remotely friendly with humans, and "tolerate" (as in they won't kill you) anyone else.
Also, Elswyer is currently under the law of anarchy, save for cities which are ruled dictatorially (the Mane was freaking assassinated!). As for Black Marsh, they've only settled on southern Morrowind, most likely deputed territory.
And unless I'm wrong, I thought there were insurgents from Valenwood doing a bunch of hit-and-run fighting in Cyrodiil.
Hopefully a whole lot of dead mer.