Nadji Jeter, actor responsible for being the Miles Morales in the games, recently participated in an interview and ended up talking more than he should have. In the interview, the actor was asked if Marvel's Spider-Man 2 will have a cooperative mode, and he replied:
I believe it was… I think it was announced. I don't know if it was announced or not, but I believe so.
The actor simply comments that Marvel's Spider-Man 2 will have a co-op mode, but doesn't provide many details. Nadji Jeter mentioned that Miles Morales will go through a process of maturing and developing his skills in Marvel's Spider-Man 2. He will learn to use his web in more creative ways, both to swing around the city and to improve his fighting techniques.
Marvel's Spider-Man 2 is in development for PlayStation 5.