I don't think steve and tony will have any problem working together again if they need to
it will be interesting to see how guys like dr strange are recruited to the team
I'm guessing it will end up being tony who has the tech to get everyone to space, unless starlord rolls up and picks everyone up
Based on the ending to Civil War, Steve clearly has no problem working with Tony i'd say. However, with the Accords still being the law of the land I could see Steve and his guys staying underground for the first part of Infinity War. Then you have Tony working with Vision, Upgraded War Machine, Spider-Man, and recruiting people like Dr. Strange and the Guardians of the Galaxy. Then he eventually uses that cell phone to call in Steve and everyone else.
Yeah and it seemed like even though he was unhappy with the way things played out, Tony doesnt hate Steve and understands where he was coming from.
It all depends on how the thanos threat arrives, because if its like a mass alien invasion I'm sure the governments of the world will be to busy worrying about the fate of humanity to not accept help from Steve and friends.
My guess is the first move will take place on earth with Thanos launching an all out attack to get the gem in vision's head. So my guess is the phone call is not needed and both squads show up to help protect the world and vision's forehead.
Then vision dies or somehow can still live without the gem and they have to regroup and beat thanos in space for the second movie.