In addition to Hellboy, you'll be able to tackle the game as fish-man Abe Sapien, pyrokinetic Liz Sherman and one other character that appears only in the comics. (Publisher Konami wouldn't tell us who, but our money's on Roger the homunculus.) We only saw brief snippets of Abe and Liz in action, but it's pretty obvious that they'll play a lot differently than brutish old Hellboy - something that should make online co-op play more interesting.
Action aside, Hellboy promises to pack in plenty of other goodies for fans. The story is an original joint effort by Hellboy creator Mike Mignola and weirdo movie director Guillermo del Toro, both of whom also guided the game's overall creative direction, and actor Ron Perlman will provide Hellboy's gravelly voice. It's way too early to judge how good of a job they're doing, but the game looks to have a lot of potential, and we've got our fingers crossed for fall.