February 2, 2008 -- The Ultimate Fighting Championship returns to Las Vegas with a card so big the Mandalay Bay Events Center can barely contain it. Former pro wrestling superstar Brock Lesnar makes his UFC debut in an explosive battle against ex-heavyweight champion Frank Mir, and the interim UFC heavyweight title is on the line as Brazilian superstar 'Minotauro' Nogueira looks to take down two-time champ Tim 'The Maine-iac' Sylvia. Also features middleweight contender Nate Marquardt, lightweight up and comer Tyson Griffin, and the return of 'The Big Dog,' Ricardo Almeida. Event Bouts: - Tim Syvia Vs. Antonio Nogueira - Brock Lesnar Vs. Frank Mir - Nate Marquardt Vs. Jeremy Horn - Ricardo Almeida Vs. Rob Yundt - Tyson Griffin Vs. Gleison Tibau - Chris Lytle Vs. Kyle Bradley - David Heath Vs. Tim Boetsch - Terry Martin Vs. Marvin Eastman - Rob Emmerson Vs. Keita Nakamura