If you Google Batmania, you'll get a million results including a Wikipedia entry on a fanzine probably written by said fanzine creator. Though for an entire generation of folks, Batmania specifically refers to the media blitz surrounding the 1989 Batman movie. Toys, games, fast food tie ins, it's the kind of thing I love. It continued for each Batman movie up until 1997's Batman Forever.
Following Batman movies had various tie ins and stuff, but not the awesome craziness of a Batman cheeseburger at McDonald's (back when you wanted to eat there). While which series of Batman movies are 'the best' is often debated in nerd circles, I'm pretty biased to this era. Not just for the Batmania, because dude, I love those movies.