WrestleMania IV had everything: tournaments, champions, and upsets.
The big story leading into WrestleMania IV was Andre beating Hogan and ending a four-year reign and trying to give the championship to Ted DiBiase. That's how the title became vacant and got the tournament going.
Bad News Brown def. Bret “Hit Man” Hart, Jim “The Anvil” Neidhart, Jim Powers, Paul Roma, Sika, “Dangerous” Danny Davis, Sam Houston, Hillbilly Jim, B. Brian Blair, Jumpin’ Jim Brunzell, Ray Rougeau, Jacques Rougeau, Junkyard Dog, Ken Patera, Ron Bass, King Harley Race, Nikolai Volkoff, Boris Zukov and George “The Animal” Steele
Ultimate Warrior def. Hercules w/ Bobby “The Brain” Heenan
Brutus “The Barber” Beefcake def. Honky Tonk Man w/ Jimmy Hart and Peggy Sue by DQ
The Islanders & Bobby “The Brain” Heenan def. The British Bulldogs & Koko B. Ware w/ Matilda
World Tag Team Championship
Demolition w/ Mr. Fuji def. Strike Force to become new champions
WWE Championship Tournament
Round One Match – “Million Dollar Man” Ted DiBiase w/ Virgil and Andre the Giant def. Hacksaw Jim Duggan
Round One Match – Don Muraco w/ “Superstar” Billy Graham def. Dino Bravo w/ Frenchy Martin by DQ
Round One Match – Greg “The Hammer” Valentine w/ Jimmy Hart def. Ricky “The Dragon” Steamboat
Round One Match – Randy "Macho Man" Savage w/ Elizabeth def. “The Natural” Butch Reed w/ Slick
Round One Match – One Man Gang w/ Slick def. Bam Bam Bigelow w/ Oliver Humperdink by count-out
Round One Match – “Ravishing” Rick Rude w/ Bobby “The Brain” Heenan vs. Jake “The Snake” Roberts went to a draw
Round Two Match – Hulk Hogan vs. Andre the Giant w/ Bobby “The Brain” Heenan, “Million Dollar Man” Ted DiBiase and Virgil ended in a double DQ
Round Two Match – “Million Dollar Man” Ted DiBiase w/ Virgil def. Don Muraco w/ “Superstar” Billy Graham
Round Two Match – Randy "Macho Man" Savage w/ Elizabeth def. Greg “The Hammer” Valentine w/ Jimmy Hart
Round Three Match – Randy "Macho Man" Savage w/ Elizabeth def. One Man Gang w/ Slick by DQ
Main Event - Finals of WWE Championship Tournament
Randy "Macho Man" Savage w/ Elizabeth and Hulk Hogan def. “Million Dollar Man” Ted DiBiase w/ Virgil and Andre the Giant to become new champion
WrestleMania IV was the first time there was a tournament for any championship and the only tournament; Hogan was not in the main event match for the first time; there were 15 matches for the first time; and that is the most in WrestleMania history, and WrestleMania IV was the first one that the WWE championships changed hands when Savage beat DiBiase.
WrestleMania IV Rating: 7 out of 10. I say 7 because the best matches were in the tournament, and I would have loved to see JYD in that tournament but you can't have everything.