Pack 1 had Chris Masters, alternate Kelly Kelly attire (sexy devil) and Rey Mysterio (skull attire)
When you enter the free Online Axxess code that comes with the game, you automatically get those for free.
3 is gonna have Alternate Shad (current), CM Punk (mask), John Cena (new merch), and WCW Monday Nitro Arena. (Which I am very much looking forward to)