Check the Tombstone VS Batman and Robin thread, no nasty fanboy showed up, they knows what's going to happen to Bats.
Spidey was able to beat Tombstone, Batman is a pussy compared to him.
Look at any Batman VS Superpowered guy battle.
There are special circumstances that grant him victory.
He fought Superman with prep time and kryptonite in normal continuity.
He fought a weakned Superman with prep time, a tank, and battle armor in DKR.
He fought a powerless Superman in Red Son thanks to red sun radiations.
Without prep time, Batman VS Metahumans means he get the crap beaten outta his body, Deathstroke can wipe out him, Spider-Man isn't Slade, but he's far stronger than Batman and can walk over him anyday.