We have to wait nearly two years to see Henry Cavill's Superman take on Ben Affleck's Batman on the big screen — but you can read the screenplay for another Superman/Batman movie right now.
Below is a ScribD embed of the script for Batman Vs. Superman: Asylum, as written by Andrew Kevin Walker and revised by Akiva Goldsman in 2002. This is the one where Batman's wife dies and he retires, until he teams up with a bitter, divorced Superman years later — until they're tricked into fighting. Anyway, read for yourself. [via Geek Tyrant]