General Fujita's consciousness is somehow transported into the body of the Hulk. He has all of the martial arts skills and brutality he had in Fist of Legends but scaled to the stats of the Hulk. And he is completely used to his new body.
He fights against Thanos, in a rematch after getting his ass kicked in Infinity War.
Thanos has his halbard, Fujita Hulk has an endless supply of wooden dojo signs to throw at Thanos.