Suggested by Sonic Mr Freeze has always been a fun villain. I like his ice gimmick and the guy has quite the tragic backstory. That said, I don’t think this will be enough to beat Hawkman. I may not like this hero very much but the guy does have super strength and flight. It shouldn’t be hard to dodge Mr Freeze’s attacks and then launch a counter right at the end. Freeze doesn’t have the durability to endure that. Hawkman wins.