The John Cena "clones/chain gang" that appeared at WrestleMania were a collection of independent workers from the area that fit the physical description the company was looking for. As mentioned, the entrance was inspired by the Eminem performance at the MTV Music Awards from years ago.

FightLine.com is reporting that Frank Shamrock was not only at WrestleMania with Mickey Rourke, but was also with him at the WWE Hall of Fame Ceremony.