#2 The nWo invades WWE
Ah, the New World Order. It's pretty much the Invasion angle of all Invasion angles. It changed the landscape of pro wrestling and forced WWE to adjust its product drastically. That led to the Attitude Era, the rise of Stone Cold Steve Austin and The Rock, and eventually, World Championship Wrestling getting purchased by the same company it tried to put out of business.
Not long after that, there was a power struggle between Vince McMahon and Ric Flair, where both men essentially owned half of the company. In McMahon's mind, if he couldn't control the entire company, he would destroy the company - with a lethal dose of poooooooisonnnnn!
A female WWE star said her life is in danger. Details HERE
At No Way Out 2002, Hollywood Hogan, Kevin Nash, and Scott Hall opened the show.
While this angle didn't really work out the way Vince McMahon expected, it still led to some great moments. Most importantly, it led to the legendary Hollywood Hogan vs The Rock match at WrestleMania X8. That was followed up by one last world championship run for Hogan and also, well... Mr. America.
Of course, it wouldn't be the last time we'd see the nWo. At WrestleMania 31, Hogan, Nash, and Hall would come to the ring to back up Sting (of all people) against Triple H and D-Generation X. The faction was inducted into the WWE Hall of Fame as part of the Class of 2020.