The Thwarted Wayne Murders – Watchmen

Four years before Zack Snyder announced that he'd be bringing Batman to the big screen in Batman V Superman: Dawn of Justice, he included a Batman-centric Easter egg in his ambitious Watchmen adaptation. During the film's opening credit sequence, which serves as a sort of prologue for the events to come, the original Nite Owl is seen punching out a criminal in front of an opera house. Upon closer observation, it's clear that the man with the gun must be Joe Chill, and that the people who are being saved are Thomas and Martha Wayne. For further proof, you need only look at the wall of the opera house, which has a Gotham newspaper on display as well as a host of Batman comic book covers. This means that in the Watchmen universe, the Wayne murders never happen, which means Bruce likely never becomes Batman.