Depends which Hamill shows up. If the wannabe standup Hamill shows up, it'll be a short night for him. He should wrestle. I haven't ever understood why you have an extreme skill and you change it for something else. I understand the need to train, that's good, but use it to defend yourself from an attack or to set up a takedown.
Good luck to Hamill, love the guy, but I don't give him a shot at all in this fight.