#2 Baron Corbin only found out he was debuting the day before

After almost four years in NXT, Baron Corbin made his WWE main-roster debut in the Andre The Giant Memorial Battle Royal at WrestleMania 32.
As an unannounced participant, it’s fair to say “The Lone Wolf” wasn’t exactly among the favourites to win the match. However, he outlasted every other man, eliminating Kane at the end, to create a 'WrestleMania moment' on his debut.
Speaking to Chris Jericho on Talk Is Jericho in 2017, Corbin revealed that Triple H informed him the day before the event that he would be involved in the match.
“He never breaks typing on his cell phone to tell me this, but he's like, typing on his phone, he looks up, he goes, 'Hey, tomorrow, you're going to be in the Andre The Giant Memorial Battle Royal,” said Corbin.