How do you unlock the Saturday night main event arena in 2009?

To unlock the Saturday Night main Event in WWE Smackdown vs Raw 2009, you have to play Rey Mysterio and Batista's Road to Wrestlemania, when you have a 2 on 3 handicap match you must perform a finisher to all three superstars and you have to help your partner beat Edge for the World Championship at No Way Out!