Apparently there is a group of TDK fans who thought Ledger's performance as the Joker was so OMG AWESOME that the character should be retired forever.
http://www.cnn.com/2009/SHOWBIZ/Movi...oom/index.html
I appreciated Ledger's performance as much as anyone, but GTFO. The Joker is a cultural icon, and bigger than any actor who portrays him. People who engage in this degree of fawning make me nauseous.