Originally Posted by
Grizzly Willy
Well, no, it would pick up depending on where you left it. If you sided with the Stormcloaks it would have them allying with the Redguards. If you sided with the Empire, they would be the ones allying with the Redguards. They wouldn't force the player into a specific outcome that they didn't pick. That would ruin the entire point of the civil war quest line.
If it's a new game, then they could have the Empire reaching out to the Redguards covertly in order to take out the Aldmeri Dominion. There's justification for Stormcloak and Empire victories.