User blog comment:Mark4518/X-Men’ Producer Would Love An ‘Avengers’ Movie Crossover/@comment-1895174-20130219133851/@comment-2031194-20130220035912

Agree with LoveWaffle too. A crossover movie would be terrible. The references to the X-Men or Spider-Man would be good though. On the topic of a crossover movie though, you also have to take into consideration the actors. Robert Downey Jr. is already in his mid-forties. By the time you'd have enough movies (say maybe 2020), many of the actors would be too old to continue their parts, causing replacements, causing discontinuity, causing even more suckiness.