The Galactic Empire has managed to find and catch the Rebel Alliance's fleet near some uncharted planet, and is moving in for the kill. However, as they do so, a battered and badly damaged Enterprise shows up out of some sort of treknobabble field. It's commanded by a disheveled, terrified Captain Riker (specifically, the one we see in TNG's Parrallels) asking for help, as the Borg (lead by Locutus) are right behind him.

Assume for all rounds, that whatever you'd consider a sufficiently threatening Borg force is about to arrive (enough to defeat the assembled ships if they don't work together, but not so much to be impossible to be defeated - so if you think a single cube is overkill, then it's a smaller ship, or it's been damaged by some sort of a chroniton-plot-field). If you think it'd take an unfathomable number of cubes, then the Borg have managed to assimilate Voyager's shuttle Pez-dispenser and have that many on the way). So, less "Who has the bigger guns" and more "Can these people talk to one another?"

Round 1: Riker has to convince the generic background characters that they need to immediately stop fighting and cooperate to face this coming threat.

Round 2: The principle characters from the Original Trilogy are present (Luke, Leia, Vader, Palpatine, etc). Same stipulations, Riker still has to convince them to stop fighting for a few hours to shoot albino dominatrixes instead.

--Round 2.1: No Palpatine

Rounds 3/4: Same as the first two, but the classic "Enterprise vs a Star Destroyer" confrontation has already happened at some point in the past, and both sides are fully aware of the other.

Rounds 5-8: Same as the previous four rounds, but Riker isn't basically insane.

Bonus Round: Can the Empire turn Riker to their cause after the fight?