Win the indicated trophy in Season mode to unlock the corresponding arena.

Backlash Arena: Backlash Trophy
ECW One Night Stand Arena: Win Money in the Bank Ladder Match on Legend Difficulty
No Mercy Arena: No Mercy Trophy
Saturday Night Main Event Arena: Superstar Challenge Trophy
SummerSlam Arena: SummerSlam Trophy
Unforgiven Arena: Unforgiven Trophy
Vengeance Arena: Vengeance Trophy
WrestleMania 22 Arena: WrestleMania Trophy