Ha. It would be funny if the characters themselves made themselves forget things that Bruce did.
Dick: So Tim, about Bruce and that whole birthday thing... Tim: What are you talking about? Nothing like that ever happened. Dick: Oh come on, you can't tell me you forgot when he- Tim: NEVER HAPPENED.
I feel your pain, though. I'm starting to do the same thing with Spider-Man right now. "What? Spider-Man sold his marriage to the devil and is now a total loser? Oh, don't be silly. It's all just a bad dream."