Source: comicbook.com

6. Tony S. and Peter Q.

This isn't just an interaction between two popular movie characters; it’s a joke between Peter "Star-Lord" Quill and Tony “Iron Man” Stark, and that makes it more significant.

During the bit, Peter objects to Tony's plan, tells him it sucks, and proposes that he come up with a plan, instead. Tony is bemused and incredibly annoyed. This moment is important, because ten years ago, Tony would have been the one to snark off at a plan he didn't like. He started off as a petulant, whiny, rich boy who matured and grew into the character we see today.

On the other hand, Peter’s been trapped in his childhood since he was abducted. His childishness and state of arrested development are driving forces of the Guardians of the Galaxy movies, and seeing that come into contact with Tony is kind of brilliant. It's really forcing him to deal with his younger, pre-growth self.

And with Spider-Man there as his much younger self, only with kindness and emotional maturity, it's sure to be a fascinating set of character dynamics.