I may have possibly found a way to include at least all of the important people at WM...here is my proposed card and still falls under the 8 matches 4 hour runtime that is tradition for WM.
The Rock vs. John Cena
CM Punk vs. Chris Jericho
World Heavyweight Championship
Daniel Bryan vs. Sheamus
Hell in a Cell match
Undertaker vs. Triple H
Diva's Championship Lumberjill match
Beth Phoenix vs. Kharma
Team Long vs. Team Laurinaitis special Referee Shaquille O' Neal
Kofi Kingston, Santino Marella ,Ezekial Jackson, and Big Show vs. Mark Henry, Christian, Alberto Del Rio, and David Otunga
MITB Ladder Match
Dolph Ziggler vs. The Miz vs. Cody Rhodes vs. Zack Ryder vs. Rey Mysterio vs. Randy Orton vs. R-Truth vs. Kane
7 matches leaving room for MITB to have some time and the Long vs Laurinaitis match, then the main event matches can each have a decent amount of time each. cannot guarantee that the creative team will be smart enough to go with this card, b/c I was going to add Kane vs. Zack Ryder and replace them in the MITB with Justin Gabriel and Hunico or something along those lines but I don't see them doing Zack Ryder vs. Kane until after mania and it will likely be a squash match anyway.
match #8 will likely be the pre show dark match and I would guess it to be for the tag titles. The Usos vs. Primo and Epico.