But before he put on the iconic cape and cowl to film "Batman v Superman: Dawn of Justice," his predecessor, Christian Bale, offered him some advice.
His first tip: beware bathroom breaks.
"Be able to take a piss by yourself," he said, according to the NY Daily News. "I found it to be ridiculously unheroic between takes when I said, 'Excuse me, I need to pee, could somebody undo me please?' "
His second tip: that mask is really heavy.
"I took three people 20 minutes with tools in order to take that cowl off (my) head," says Bale.
Bale also recently admitted his initial reaction to Affleck being cast was jealousy.