Batman vs Predator. SO 90s, so AWESOME despite that. Best. Cross-over. Ever. Seriously. It won awards. I don't think that has ever held true for any other cross-over before or since. BvsP2 was even more 90s, and suffered for it, but it's got it's moments, too. BvsP3, though was a good ending to the series. Not as good as the first one, but damn if it doesn't leave you pumped and nostalgic for when your relationship with your dad was good.