I've not read it but I'm a fan of the cross overs.
here's some that I loved with batman
- Batman vs predator
- Batman vs Alien
- Justice league vs predator - really bad comic but damn the cover was cool (Don't a have a picture but think Predators dressed up as superman , batman , flash and more it made me laugh)
- Spider-man / Batman. With carnage meeting the joker was cool as hell