Ideally, there needs to be a rematch in Sirius system. A draw, would make for an uneasy compromise storyline, with the conflict spreading as skirmishes in neighbouring systems, and fed and imp navy peacekeepers/observers being called in to help.
More like: Massive Thargoid attack on the Alliance, Sirius says "Nope, not gonna help. We were kicked out. Have fun." Salvation steps in "Make me your Overlord and I kill those bugs with my superweapon, kthxbye"
Alliance players: ...
Everyone else: lulz