1. Peter's class takes a trip to stark towers and everyone finds out peter wasn't lying about knowing tony.( If it helps anyone here is one about this )
2. Peter gets hurt or kidnapped on a mission and tony becomes overprotective.
3. The avengers (or any other hero or person) didn't already know Peter's age and are freaked out by how young he is.
4. Homeless Peter!
5. And last but not least... Peter whump.
So, I hope I can get some of these and feel free to rec your favs!