I would like to hear more of your thoughts on the team breaking up after school. Honestly, it's very likely, considering that Peter has become very distant from the team in recent seasons (and for some reason, everyone pretends that Spider is the most important member of the team, even though he joined the team later than the others, albeit as the leader). Additionally, we should not forget that Danny will 100% leave the Shield and return to Kunlun, making it unlikely for him to maintain the same level of "intimacy" with the rest of the team.
tbh I think Peter wouldn t join another team, but after all the shit he went through as leader, he would probably just want to be on his own, leave the team and shield behind... but I actually prefer version where the team breaks up because of Peters death (he dies while saving Harry from becoming green goblin, due to team not working together), rest of the team is so traumatized afterwards that they just don t see point of pretending that they are team anymore,
first one to leave is Sam, he would probably join Guardians of the galaxy again or just try to save space on his own, but I know he will 100% leave the earth bc everything there would remind him of that day, when they lost Peter
Ava would quit whole hero stuff and focus on studying, but after graduation / some time spend at collage she would rejoin Shield as agent, but she would focus more on secret missions rather than fighting villains everyday in daylight... after Peters death she would hate being called hero, so that s why she would prefer being agent
after seeing everyone leave shield, Luke would do pretty much the same thing but he would still want to help people, but not under shield anymore (they all would hate shield after what happen to Peter),... so he start fighting villains and saving people as vigilante and eventually start Heroes for hire
Danny would ofc go back to Kunlun, but here is my take, he would stop right before the entrance and realize, that maybe this isn t the place where he is meant to stay for rest of his life... so after coming back to New York (this would take place 5 months after the incident), he would visit Luke and talk to him about everything, about how he for some reason couldn t move on, about his doubts and feeling like he is not worthy of being called hero anymore... long story short, he would join Luke (yay, at least two of them stays together)
I know this is little bit pessimistic take, but don t worry, in my version all their paths will cross again after few years