The year without a singles match
WrestleMania 2000 is noteworthy for a lot of reasons: it marked the WrestleMania debut of at least sixteen different WWF superstars, it was the first WrestleMania to see a heel walk out of the main event as WWF Champion (go ahead and guess who that was), and was the first WrestleMania in six years to feature neither 'Stone Cold' Steve Austin nor The Undertaker, two of the company's biggest stars not just at that time, but at any time.
What most people remember this card for, however, is the fact that it's the only WrestleMania to not feature a single traditional one-on-one contest (and, before anyone begins to argue, we're opting not to count the Terri/Kat "Catfight"). Half of the event's matches were multi-faceted matches (this contest, the Fatal Four-Way main event, the Triangle Ladder Match, and the Hardcore Battle Royale), and the other half were tag matches with varying degrees of logic and thrown-together-ness.
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WWF/E escalated a WrestleMania trend here where, trying to squeeze as much talent as possible onto the card, multi-person matches are shoehorned in at the expense of quality storytelling; later events would include an exponential increase in multi-team Tag Team Championship matches (both of the climbing and the pin/submission variety), "we can't decide on a number one contender" multi-person singles championship matches, and battle royals. While all of these had appeared on Wrestlemania cards before, never had an entire event seen so many of them and so few one-on-one matches.