Hilarious moment at a news conference for Wladimir Klitschko's next boxing match -- when his opponent stormed the room in a Batman costume ... and then beat up a guy dressed as the Joker.
It all went down in London Wednesday -- when Tyson Fury pulled up to the event in a sick yellow Lamborghini ... in full Dark Knight gear.
Fury -- who's set to fight Hayden Panettiere's baby daddy in October -- ran around the media room like a lunatic ... before issuing a threat to Wlad in his best Batman voice.
Eat your heart out Ben Affleck.
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