He’s now in the Marvel Cinematic Universe, and he can interact with the characters in that universe. I think that this mentor relationship that Tony has developed with Peter is probably one of the most interesting things the universe has moving forward.
This adds to my theory about Tony feeling responsible for Peter. In a 'mentor-student' way.<<<it's said multiple times in comics and stuff that they have exactly that relationship. Also this is RDJ and Tom Holland not their characters