I know it sounds nuts but there are some stories I would like to read. I wouldn't have Star Wars come to Marvel Earth. I would only have Marvel heroes get somehow transported to the Star Wars galaxy for a brief time. Specifically Spider-Man. That's the thing about Spider-Man. He fits into any scenario. Because his whole schtick is to be a misfit! He can be a misfit in Manhattan, in the Dark Dimension, in Asgard - or on Tatooine. That's why Marvel Team-Up was one of the greatest comics of all time.
Wouldn't you like to see Spider-Man fighting Darth Vader alongside Luke Skywalker and Han Solo?
1. Generally, I'm against any and all inter-company/universe crossovers. I'm not even a fan of when Marvel does it with DC or Image. And I'm still not sold on HasbroVerse. IMO, GIJoe and MASK still don't fit with Transformers, Micronauts and ROM (I'd actually be more accepting of Jem & the Holograms with GIJoe-- Holograms vs Cold Slither? Sign me up!). I'm skeptical Transformers fit with Micronauts or ROM. Just because Disney owns both doesn't mean anything. It's still Marvel and LucasFilm.
2. Even Yoda and Skywalker are just ants compared to typical Marvel fare. The universes are just too different.