WM VI has the most with 4 but there's 8 that only have 1 match.
WM IV suffers the most as with (possibly) no Macho Man the tourny doesn't hold up,Hogan vs. Andre was a double DQ and Roberts vs. Rude was a time limit draw. WM VIII main events are gone with (possibly) no Macho and no Sid. No WM XI main events either as LT and Diesel aren't in.
WM I
Andre vs. Studd
WM II
Hogan vs. Bundy Cage match
WM III
Honky Tonk vs. Roberts
Hogan vs. Andre
WM IV
DiBiase vs. Duggan
WM V
Rude vs. Warrior
WM VI
Beefcake vs. Perfect
DiBiase vs. Roberts
Snuka vs. Rude
Hogan vs. Warrior
WM VII
Undertaker vs. Snuka
Hogan vs. Slaughter
WM VIII
Roberts vs. Undertaker
Piper vs. Hart
WM IX
Hart vs. Yokozuna
Hogan vs. Yokozuna
WM X
Hart vs. Yokozuna
WM XI
Undertaker vs. Bundy
WM XII
Warrior vs. HHH
Hart vs. HBK Ironman match
WM XIII
Hart vs. Austin Submission match
WM XIV
HBK vs. Austin
WM XV
Undertaker vs. Bossman Hell in a Cell match
Rock vs. Austin
I suspect maybe some non-WM classic matches will make it in to make up for how lacking some of these are like the Rhodes vs. Flair cage match,Hogan vs. Sheik,Hart vs. Bulldog Summerslam match and I can see a few others.