Appearing to be the most evil, deranged, and flat out psychotic killer of all villains, The Joker is the primary antagonist of Batman.
The Joker views murder as sport, and will not hesitate to toy with his food before he eats it, even if said food are the men he has hired to work for him.
As intimidating as he is psychotic, he still manages to recruit hordes of henchmen despite his maniacal insanity.
His methods are unpredictable and incalculable. He does things according to his own twisted sense of logic.
He is an exceptionally intelligent man, and this tends to be his greatest weapon against Batman.
Heath Ledger offered the performance of a lifetime...literally (RIP)
I don't get this half of the bracket. How are either of these dudes here ahead of Keyser Soze, Yoda, Maximus, King Leonidas (a REAL guy), Neo, and the Terminator. Corleone's quarter bracket was a joke: Donkey (really, can't put Shrek himself in there?!), Forrest Gump, and The Mask.