Go crazy. Batman is horrible with Super powers. He either becomes a tyrant and place the entire planet under his very capable hands. Or he dies when he pisses off one of the spell casters.
Batman is very, very irresponsable when he gets super powers. His brain can't process them very good, he lacks mental fortitude and discipline. He would become a monster in less time that what it took to the bullet who killed his parents to pierce his mom's brain.