Yeah that’s certainly possible.
One of my ideal scenarios though would be where the alliance dig in at Alterac, return Dalaran to Hillsbrad and build up Stromgarde/Gilneas. Forsaken dig in at Stratholme and Lordaeron is recaptured by the New Scarlet Crusade with that story that appears to be brewing. They’d be the major third party villain in the rejoin maybe with some other side groups and any other rampaging scourge left over from the Helm being shattered.