What if The Amazing Spider-Man post credit scene led up to The Avengers sequel?

This is just for fun, so I know that this may never happen, but for people who have or have not seen The Amazing Spider-Man film yet, what do you think the scene after the credits would be like if it led up to Spider-Man joining The Avengers instead?
Update: Okay, people. I know Spider-Man will probably NEVER join The Avengers. I was just saying 'Just for fun' how do YOU think the post credit scene should have ended IF in our own imagination Spider-Man would've joined The Avengers. Sheesh!
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