#4 Eric Bischoff is revealed to be the man behind the nWo (Nitro - November 18, 1996)
WWE gained the upper hand in the Monday Night Wars, mainly due to the ground-breaking Austin/McMahon feud which saw WWE Champion, Stone Cold Steve Austin clash with his maniacal boss, Vince McMahon on a weekly basis.
The evil McMahon character was created out of necessity following McMahon's real life double cross of then-WWE Champion, Bret "Hitman" Hart at the 1997 Survivor Series.
When fans loudly jeered McMahon at every opportunity, the WWE boss had no choice but to turn himself heel. However, the heel owner gimmick was actually popularised a year earlier by WCW boss, Eric Bischoff.
Bischoff like McMahon, was an affable on-screen announcer. However, on the November 18, 1996 Nitro, when confronted by Rowdy Roddy Piper, Bischoff finally revealed that he was a member of the nWo and was running the faction covertly and had been for many months.
This heel turn was a huge shocker and extremely influential in the history of wrestling as the plethora of heel owner/commissioner gimmicks in the two decades since have attested.