User blog comment:S-Man-X-Men6/Hopes For MCU/@comment-5005555-20120727064516/@comment-1713281-20120727112117

Yeah, Avengers 3 is a very far-off idea, but even so I'm not sure it'll be a breeze to have Sony give up the rights to the new Spider-Man series, or to get the X-Men rights back from Fox. And to really do it justice, they'll need the rights back to every character out there, which may be a huge challenge