Tony and Bruce implant JARVIS in his head. They can't open up his pod for some reason, though. Steve then comes in with Pietro and Wanda and Wanda warns them about Vision because she saw in his head the Ultron parts about wanting to destroy the world. The others insist that they have to see what he's like first. They banter around, then Thor suddenly arrives and attacks the pod with the flashes, because he saw in his vision that Vision has the mind gem from Loki's scepter on his head. That seems to trigger something in the pod, because that's when Vision breaks out and slams Thor through the room. I THINK there's a short battle scene after with the others but I really can't remember much. Vision then just kind of floats there by the window and thinks for a while and decides to be on the side of the Avengers. And that's it, now he's part of the team. They still don't know if they can trust him but they don't really have a choice, he's too powerful an ally and the only one who can destroy Ultron.