Not sure Disney would have a hero falls to dark side story line.
I think a false assumption is being made here, not just by you, but by a LOT of people. Disney did not purchase Star Wars. They bought Lucasfilm
. When Disney owned Miramax, they didn't suddenly start Disney-fying Hellraiser, or the Kevin Smith movies, or any of the other very UN-Disney movies that they released during that time. I'm not saying that Disney will have NO input - Star Wars is a big property that they have in their own theme parks - but Lucasfilm will almost certainly keep its own character, and if we don't get the 20th Century Fox fanfare, we will almost certainly get the Lucasfilm logo between the Disney opening and the opening crawl.