#3 Kane's WWE Debut (WWF Badd Blood: In Your House 1997)
The backstory to Kane's character in WWE was incredible, as Paul Bearer set the stage for an epic debut. After The Undertaker won the WWF Championship at WrestleMania 13, his former manager wanted to reunite with The Phenom and threatened to reveal his "biggest secret" to the world.
That secret was about his "long-lost brother", Kane. Undertaker was implied to have killed his family by burning down their funeral home, but Bearer continuously mentioned that Kane was alive. 'Taker did not buy it at first, but things would quickly change during the first-ever Hell in a Cell match in WWE history.
As The Undertaker was about to put Shawn Michaels away, the arena went dark. Then came a red light and some pyro as Bearer revealed to the world, the Big Red Machine. And in one of the greatest commentary calls ever, Vince McMahon shouted, "THAT'S GOTTA BE KANE! THAT'S GOTTA BE KANE!". It was better than anybody could have imagined.
A masked mountain of a man, basically "Undertaker in Red", Kane stood toe-to-toe with the Deadman after ripping the Cell door off. He hit 'Taker with a Tombstone Piledriver, and allowed Michaels to pick up the victory. Debuts don't come much better than this in WWE.