Jervis Tetch, the Mad Hatter, is either a creepy and horrifying stalker obsessed with blonde girls named Alice, or a lame nobody who will jerk Batman around for twenty minutes with hat-based shenanighans before getting punched once--then case closed. With how Arkham Asylum and its sequel Arkham City have been making some of Batman's lesser villains more indimidating, the Mad Hatter is a welcome addition to the game.
So far, in addition to major villains Two-Face, Joker, and Hugo Strange, we've had a chance to see the Penguin, the Riddler, Poison Ivy, Bane and Harley Quinn, while the trailer shows off not only the Mad Hatter, but gives us glimpses at Mr. Freeze and someone who has to be Solomon Grundy.
Arkham Asylum was pretty much the perfect Batman experience in a video game. By opening up the world and giving us almost all of Batman's major and minor villains in some capacity, Arkham City looks to be even better. What do you think? Any Bat-villains you want to see show up? Maybe Firefly, or Ratcatcher, or the Ten-Eyed Man?