Man-Beast vs Batman

They both get 2 days of prep who wins

Man-Beast- http://www.immortalthor.net/bio-manbeast.html

vs

Batman- http://spider-bob.com/heroes/dc/BatmanI.htm

Sonic grenade . Batman wins.

Batman is the master of prep. Give him two days of prep and he could probably beat up on Galactus. 😛

He is going up against a Super Genius I think Man-Beast would whip the floor with Bats

Batman, as much as I dig him, has zero chance.
Man-Beast is basically the darker version of Adam Warlock.
He is VERY powerful, way genius, and on a level with Doctor Doom or Loki or Lex Luthor in the sneaky/cunning department.

Maybe if Bats had prep, and MB didn't, he might be able to take a couple out of 10. But, even up, no chance.
Sorry Bats.