Comic-Con just opened up its show floor for Preview Night, and in among the booths is a new playable version of Injustice: Gods Among Us, with two new heroes. Nightwing and Cyborg have joined the fight in Netherrealm's gritty fighting game. Nightwing (aka Dick Grayson, the original Robin) is a nimble staff-wielding fighter, and Cyborg is a heavy hitter, with strong close attacks backed up with laser shots and missile strikes.

We'll get a chance to play both of these heroes tomorrow on the show floor, and we'll let you know how the game is looking these days. Comic-Con runs through the weekend, so stay tuned for lots more four-color-based news from San Diego.