If you weren't planning on pre-ordering X-Men Origins: Wolverine (Xbox 360, PS3), maybe this new promo from GameStop can change your mind.
Pre-ordering it from GameStop will give you access to the Weapon X custom combat arena, an environmental simulator, and an extra challenge level. You'll also get a mysterious fourth room but they can't talk about it yet. Sounds like the post-game extra levels in God of War, which isn't surprising since it was a heavy influence for the game.
The extra content promises more hours of gameplay that'll give you a chance to really let go as Wolverine. They're all free for the pre-order too. Likely they'll also be available as DLC some time after the game is released though. You can get pre-orders after the source link.