#2 The Undertaker vs Chris Benoit: WrestleMania XIX
Original match: The Undertaker vs Big Show and A-Train - 2-on-1 Handicap Match
For five years, The Undertaker and Chris Benoit were Smackdown's most reliable and consistent Superstars. However, it is mind-boggling that the two Smackdown originals only crossed paths in one pay-per-view singles match, at Rebellion 2000, where The American Badass was victorious.
Though both men rarely encountered each other, fans in the Ruthless Aggression Era salivated over a feud between The Undertaker and Chris Benoit. Unforunately, WWE never booked the feud, even though there was a five-year window to do so.
Furthermore, prior to WrestleMania 23, the former World Heavyweight Champion claimed in an overseas interview that there was one big singles program left for him to do, and that was a showdown with The Phenom.
As for Benoit's technical ability, his style would have meshed perfectly with The Undertaker's ability to adapt to any wrestling style his opponent possesses, which was seen in his unique chemistry with the likes of Bret Hart and Kurt Angle, who wrestled in a similar manner to Benoit.
When WrestleMania XIX rolled around in 2003, Big Evil was placed in a throwaway handicap match with Big Show and A-Train while The Canadian Crippler was tossed in a triple-threat tag team match with Los Guerreros, The World's Greatest Tag team, and Rhyno. As great as WrestleMania XIX was, a guaranteed wreslting clinic between two of Smackdown's finest could have placed it up there with the revered WrestleMania X-Seven.