Originally Posted by The Joker
If it was such an improvement on their relationship as you keep claiming, why did it never get adapted into the comics? It wouldn't be the first time DC took ideas for characterizations from movies or cartoons. Look at Mr. Freeze and Harley Quinn for example.
I'll tell you why, because it's a terrible idea. Or maybe you're just too "narrow minded" to see that?
You're talking about a total retcon, though. It was already established that Joe Chill was the killer in the comics.
Freeze was never given an origin, so it works perfectly fine. Harley Quinn is a completely new character.