Two factors to consider are that each man is shirtless and the punchee has his hands on the punchers shoulders as if he is pulling him into the portal.
Now Im not worried about the look of the portal thing, Im just asking what assets a compositor would expect when putting a shot like this together. Whether they be cg extensions or live footage. What would you want ideally.
For example would you need to shoot each person individually and then comp them together and roto the arm away? My only problem is how do you get clean interaction between then each man when they touch each other.