All the pre-order specials....
Gamestop
Contenders Fight Pack
• Jason "Mayhem" Miller
• Brian Stann
• Phil Davis
• Nick Diaz
Best Buy
Early Access Pass
• 150 in-game items for created fighters, including t-shirts, hoodies and caps, as well as a variety of unique nicknames like "The Prince of Pain," "Wild Thing" and "The Bone Collector."
• Access to new bouts in Ultimate Fights Mode, including Brock Lesnar vs. Cain Velasquez (UFC 121), Chuck Liddell vs. Rich Franklin (UFC 115) and Anderson Silva vs. Forrest Griffin (UFC 101)
• "Legendary Chuck Liddell" playable fighter
Wal-Mart
Ultimate Fights: Knockout Pack
• Five of the most memorable knockouts in UFC history for use with Ultimate Fights Mode (a "challenge-based system that encourages players to recreate famous UFC fights in order to unlock authentic fight montages, behind the scenes footage and fighter interviews.")
Amazon
Ultimate Knockout Artist Boost Pack
• Allows a player to "build his or her own specially created knockout artist using instant upgrade tips from UFC Undisputed 3 game designers. This boost to a player's Create-a-Fighter will save an estimated 8-10 hours of gameplay time that would traditionally be spent training the ideal knockout artist."