A new trailer was shown at Comic-Con today, revealing another one of Black mask's assassins: Copperhead. This version of the character is female, as opposed to the traditional male Copperhead. Geoff Johns has said that this female version of the character will be added to the comics.
Also announced at SDCC were some of the alternate character skins:
Eric Holmes, creative director for WB Games Montreal, also showed off new skins that will be available for Batman in the game. These included one from the Classic 1960s TV series, Knightfall, Deathstroke - who will be a playable character in the challenges for those the preorder the game, Batman One Million - a very futuristic take on the hero based on Grant Morrison art, and Worst Nightmare - a savage, horrific look at Bats that was characterized as a ‘hardcore unlock,’ meaning that it only becomes available very late in the game. Holmes said more skins will be revealed via Twitter (@ericholmeslive) in the near future.
And there will no Robin in the game, though a Batgirl appearance was hinted at.