10 Behind-The-Scenes Secrets Of MCU Movies
2. Amazing Spider-Man Almost Crossed Over With The MCU
Sony's two Amazing Spider-Man films are (perhaps overly harshly) reviled for their take on the web-slinger. It's funny to think then that that version of the character came very close to being the MCU's instead of the mini Tony Stark most fans have come to love.
The tie-in was going to be established through way of the Oscorp building appearing in the Manhattan skyline of the first Avengers film. The first Amazing Spider-Man movie would have then released a few months later, featuring the same Oscorp building, and presumably have led to more blatant crossovers later down the line.
If Spider-Man wasn't going to appear in Avengers Assemble then it does beg the question of when ol' web-head's movie would have been set, as New York would still be recovering from the Chitauri were it set afterwards. Which is probably one of several reasons why Sony and Marvel decided not to join forces at this point in time.