The Missing Brother

Lastly, we have a theory that has bugged fans for quite some time. It explained why Batman wouldn’t kill the Joker, no matter what the latter did. What if there were an actual blood connection between Bruce Wayne and his nemesis? What if the Joker were actually Thomas Wayne Jr., the hero’s older brother who presumably died of a head injury as an infant?

This was just a theory, and DC Comics hasn’t even tried to approach it. But it could be a stroke of genius if whoever ends up making the origin film decided to address it (and we still hope that it isn’t the Hangover guy.)

What do you think? Are there other origin stories that should be taken into consideration for this film?