Marvel Heroes is based on Diablo-style action loot-fest gameplay with significant MMO and RPG elements. In the game, you'll play as Marvel characters themselves, customizing them with different costumes, equipment, and powers, clicking mouse buttons furiously in combat, looting like crazy, and joining with friends to take on quest objectives and dungeons.
I dunno. There's a lot of click-fests out there already. Putting Wolverine on the screen doesn't seem like enough of a differentiator.