He gotta conversation with Ari, Nick, Hunter, Vince, Bruce
He gotta have a talk with Heyman and Adam Pearce
He gotta hash it out with Roman, Rollins, Owens, Miz (which kinda happened but you know)
And you gotta mentally be prepared to accept that he will get blowback from the marks. Granted they already hate him but you know, he cant be too in his feelings.
He also gotta accept that plans change pal and he may just come in to job after a bit.
I think he just needs a call with Trips, and he needs to actively bury the hatchet with him, and Trips needs to lay down the law and tell him any type of antic you're going home.
But the top stars like Rollins and Reigns hate him, so I think that would hold a ton of weight. These are the guys he needs to be working with if he returns too. It's different than a Cody/Rollins where they can still work together despite not liking each other. Punk's reputation is the worst it's been, and you have to convince those stars it's a good idea to bring him in.