Marvel hasn't tried yet. All the legal wrangling has been about getting to try.
I think Marvel will do a good job. Their experience with the Avengers and the Guardians of the Galaxy will point the way.
I should think everyone knew this and it's why Disney's deal with Fox was such a big story in the news and especially on the comic book sites.
Stan made a deal a long time ago with Constantin Film, who went to Fox to produce the movies. They also rushed that unreleased Roger Corman film into production just to keep the rights they were about to lose.