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?