Play Road To WrestleMania with Christian. Talk to Edge in the south locker
room at the Elimination Chamber PPV about the Time Machine. Then, go to the
GM Office, and talk to Vince McMahon. You will find out the Time Machine is
broken into three pieces (they will appear as three green dots on the map).
Look for the Edge and Christian action figures. They are between the bookshelf
and the TV. Once you leave, you will get a phone call from Edge. 
The "Flux Capacitor" (Back To The Future reference) is in the Green Room.
The "Phone Booth" (Bill & Ted's Excellent Adventure reference) is in the 
parking lot. Go to Edge with all three parts to get the Time Machine, which 
llows any Superstar to travel to any point in time on the Road To WrestleMania.