Thor Vs. The Martian Manhunter
Superman himself said that Martian Manhunter was the most powerful of the JLA. He also said that he would be afraid of the Martian Manhunter if he ever went rogue and he had to fight him. So, with that in mind, who would win in a fight between the Manhunter from Mars and the Son of Odin? Now, I'm talkin' an all out, no-holds barred, givin' all they got, kind of fight...there's no prep and the fight takes place in space around the JLA watchtower....who wins?