[DogFashionDisco]

Batman has trained to mentally and physically adapt to dangerous situations, and Iron Man has a cool robot that he wears like a suit. I've seen Batman short circuit suits and robots like that plenty of times (read Under The Hood) so it isn't completely unlikely that he would just even the odds somehow and kick Stark's ass once the suit was deactivated. I could see Stark drunkenly peeing on the Batmobile while Bruce was busy buying tights for Robin (sorry, obvious gay joke) and he'd fuck him up when he returned to his vehicle. Plus, they basically play the same role, just in different universes (DC vs. Marvel).