Yesterday, director Bryan Singer shocked the comic book fan community when he announced that Evan Peters had been cast as Quicksilver in X-Men: Days Of Future Past. Singer tweeted, “Before he was an #Avenger, he was just a REALLY fast kid. Thrilled to say #EvanPeters is joining #XMen #DaysOfFuturePast as #Quicksilver.”
Considering the problems between the two companies that was a good idea.
Even without mentioning "the avengers" quote on his tweet it is clear that they wanted to give some statement about still having rights to that character because marvel already stated earlier that they have plans on bringing quicksilver on the avengers 2 and then suddenly Singer added quicksilver just for a scene.
Disney should try to buy the characters back.