Michael Bay directed a little art house film titled Armageddon back in 1998, which stared Bruce Willis and Ben "Batfleck" Affleck as two oil drill workers hired by NASA to help stop an asteroid from hitting the planet. It was an okay, movie- but let's take a look at it again- with a Batfleck lens...
Let's face it, this would have been a 12 minute movie, if that. First off, let's assume that somehow the asteroid would have gotten past Batfleck's notice to begin with (maybe Batfleck was busy tracking down Penguin or something)- the truth is, once aware of said asteroid Batfleck would have flown up in his Batfleck-plane and yelled at the asteroid till it got scared and changed course of its own free will. If that didn't work then Batfleck would have simply scared the asteroid into submission.