Woah. Disney now owns Marvel outright (for 4 billion big ones).
http://www.aintitcool.com/node/42204
Current plans are that all movie deals remain with the respective studios that own them (Spiderman with Sony, X-Men with Fox, Iron Man with Paramount, etc), but once those deals expire the distribution rights will revert to Disney. Also, Pixar movies based on Marvel characters are being discussed.

