Decepticons versus the Death Star...
Two scenarios....
1: Starscream is flying around space and is sucked into a black hole. He emerges in the Star Wars universe, the Death Star in sight. As Starscream gets his bearings, he is swarmed by 4 TIE fighters. He takes them out easily, then sees more coming from the Death Star.
Pissed, he decides to take the Death Star out. The Death Star from ANH, BTW, and the number of TIE's is the same as in ROTJ, more or less, they are everywhere. No Star Destroyers.
2: Same as scenario one, but also throw Megatron into the mix.
Also, in both scenarios, Vader is in the mix, in his personal TIE fighter.