Sheesh, before anyone posts anything about whether Batman or Ironman will win...it's helpful if you know about BOTH. Otherwise, it's pointless...really.
Batman meets Ironman face to face for the first time. Ironman easily takes this one. REmember, you're dealing with another superhero, not a supervillain who somehow manages to f*ck up every time. Ironman is in another class of his own. Yes, his suit gives him superpowers. Yes he can lift insane weight. Yes, he can incinerate Gotham City. I think this is as pointless as all the Batman vs. Superman threads (which I never liked..cuz it's simply pitting two popular icons against each other and often making Batman win because it's "cooler" that way). I even think Tony Starks might be richer than Wayne. Somebody correct that one if I'm wrong.
In so many crossovers and JLA v.s Avengers, there IS a reason why the DC heroes are pitted against similar, if not equal counterparts. They would never pit Batman against Ironman cuz it's just.....dumb.