WC
As a rule, alternate endings don't make it into the film because they were a bit naff; a back-up idea that clearly didn't past muster with the creative types. Heck, just a couple of weeks ago we looked at 10 Great Movies Almost Ruined By Their Alternate Endings, which highlights just how bad some iron-clad classics could have turned out.
I see WhatCulture still hasn't figured out how to use less pages...