Go into 24/7 Mode, select the Laptop, and select WWE Shop.

Effect	How to unlock
"Ravishing" Rick Rude	Buy in the WWE Shop for $210,000.
"Rowdy" Roddy Piper	Buy in the WWE Shop for $210,000.
"Stone Cold" Steve Austin	Go into the Hall of Fame and select Stone Cold. After defeating him in a Submission Match using Bret Hart, you can buy him in the WWE Shop. $210,000
Bret Hart	Defeat Bret Hart in the Hall of Fame direct challenge mode. Afterwards, buy him in the WWE Shop. $210,000
JBL	Buy in the WWE Shop for $110,000.
Mick Foley	Defeat Mick Foley in the Hall of Fame direct challenge mode. Afterwards, buy him in the WWE Shop. $210,000
Sabu	Buy in the WWE Shop for $210,000.
Shane McMahon	Buy in the WWE Shop for $110,000.
Terry Funk	Defeat Tommy Dreamer, Sabu and Sandman in an ECW Extreme Rules 4-way match using any superstar on "Legend" Difficulty. $210,000.
The Rock	Defeat The Rock as Stone Cold in "Legend" Difficulty. $210,000
Vince McMahon	Defend a championship in 24/7 mode, $110,000