Star Trek: 10 Ways To Do A Crossover With Star Wars
1. Q
The omnipotent alien entity who torments the Next Generation crew is pretty outspoken about how fascinated he is with human history, even going so far as putting humanity on trial for being a Dangerous, savage child-race.
That opinion would most certainly change if he watched Star Wars. Star Wars is great. Theres this one episode where Q zaps the crew to medieval England and forces them to play out a Robin Hood fantasy, so its not crazy to think that after seeing Star Wars and loving it, hed come back and zap them into Star Wars and make them play that out too.
Shortly thereafter, Q would inevitably see the prequel trilogy and then hed have to put humanity on trial again.