Awesome, second place!!! :D Thanks for all the votes, people!
He can still collapse stars and black holes with his bare hands, has FTL fighting speed, and monstrous durability so Diana would still get wrecked if she fought him at his best
Diana is Massively FTL, for she's able to keep up with Flash, even when he's about to enter the Speed Force. Fighting him at his best, he would most likely have the power advantage, but Wonder Woman could win with her speed. His confidence would drop a the fight goes on, and finally he'd lose to an easy hit.