The most obvious answer is
5 Biggest Singles match
1. Stone Cold vs Hulk Hogan between 1998 and 2003, it could still have happened around 2005 if done properly
2. John Cena vs The Undertaker if this match would have taken place before Takers loss to Lesnar, this would have been a match for the ages.
3. Stone Cold vs Goldberg ca 1998-1999
The Ultimate Warrior vs The Undertaker say 1992
4. Tie between Hulk Hogan vs Bret Hard ca 1993-1994 or Ultimate Warrior vs Goldberg ca 1999, both matches would have been awesome if built right.
5. Stone Cold vs Brock Lesnar
5 Biggest Tag-Team Matches
1. Blade Runners vs Mega Powers from ca 1990
2. Demolition vs Legion of Doom
3. Legion of Doom vs Steiner Brothers
4. Austin, Rock & Foley vs Hogan, Hall & Nash
5. British Bulldogs vs Brain Busters - With Bulldogs being insanely
Biggest Triple Threat Matches
1. Hogan vs Savage vs Warrior (1990's)
2. HHH vs The Rock vs Stone Cold (AE)
3. Undertaker vs Sting vs Kane
4. Cena vs Undertaker vs Lesnar
5. Bret vs Angle vs Chris Benoit ca 2000
I like all your choices
I'm sorry for being ignorant but why is Rock vs HBK such a must see match?
I agree, while if it had the proper built towards a WM it would have been cool. But still, the matches I ranked are bigger. Don't get me wrong HBK vs The Rock would be huge. Bigger than any WM mathc HBK has been invovled in almost. But not as huge as my picks.
Heck even Bret vs Angle would have been as huge