For me it would be;
WRESTLEMANIA: THE INVASION
Cruiserweight 5 man match ladder match
Gregory Helms (c) VS Rey Mysterio Jr VS Jeff Hardy VS Billy Kidman VS Matt Hardy
Winner: Gregory Helms
Kurt Angle, Edge & Christian VS Chris Jericho, Chris Benoit & Eddie Guererro (with Dean Malenko)
Winner: Kurt Angle, Edge & Christian
1 Year of Immunity Battle Royal, featuring;
Scott Steiner, Booker T, Kane, Big Show, Mike Awesome, Test, Diamond Dallas Page, Raven, Rhyno and others.
Winner: Scott Steiner
Undertaker VS Sting
Winner: Dead Man Undertaker
Old Friends, Bitter Enemies
D-Generation X, Shawn Michaels and HHH VS The Outsiders, Kevin Nash & Scott Hall
Winners: The Outsiders (Afterward X-Pac returns and all 5 men embrace in the ring.)
Trish Stratus & Lita VS Stacy Kiebler & Torrie Wilson
Winner: Trish Stratus & Lita
50/50% Owners Battle
Vince McMahon VS Ric Flair
Winner: Vince McMahon
"Stone Cold" Steve Austin VS Bill Goldberg
Winner: Goldberg (They can have a beer afterward, and Austin can Stun him and leave)
The Rock VS Hollywood Hulk Hogan
Winner: The Rock
This could lead to a War Games PPV, Featuring WWE VS WCW VS NWO/DX:
The Rock, Stone Cold, Undertaker, Kurt Angle & Vince McMahon
Hollywood Hulk Hogan, Sting, Chris Jericho, Chris Benoit & Ric Flair
Triple H, Shawn Michaels, Kevin Nash, Scott Hall & X-Pac.
There are people I have not included because either I couldn't think where they fit; Dudley Boyz, APA, Lance Storm, Tajiri, Tazz, or because even though they were WCW, or WWF, they have no place on a PPV of this order; Albert, Billy Gunn, Sean O'Haire, Chuck Palumbo, Chris Kanyon, Shawn Stasiak and Hugh Morrus from the real InVasion event.
I like my ideas though, there's no dead weight. I would have Bischoff/Hogan/Flair leading WCW/NWO, and have Jericho turn back to WCW and in turn, convince The Radicalz to do the same. Bischoff could own WCW, and Flair could own half of the WWE due to Stephanie and Shane selling their stakes after their Father threatened to destory WWE just to spite them. Good guys in WCW such as Rey and Kidman wouldn't have to trust Bischoff or wear WCW colours, just have heel Jericho in their head all of the time. The Cruiserweight Ladder Match would be akin to the dangerous ladder matches of the time, and all 5 are decent wrestlers and performed well in ladder matches. Kurt, E&C, Jericho, Benoit & Guererro match could have been a very good, heated tag match. The Battle Royal, meh... I think if done right it's a very good concept. It could include stuff like DDP pulling out the Diamond Cutter from an attempted Kane chokeslam, Awesomebomb to Raven over the top rope, Rhyno Goring Big Show and Steiner picking the bones of DDP helping to get rid of Show & Kane, to be thrown out himself by Test who in turn is throw by Scotty. For a 15 minute match it could be okay. DX VS The Outsiders would be obvious if all were available at the time, having X-Pac return at the end would more be done to setup War Games. NWO/DX could just carry on like they did at the height of their run, kicking out Hogan after what happens later in his match with The Rock. Undertaker and Sting would be one of those dream gimmick VS gimmick matches if done right. Got to have the divas, and the original matchup was pretty cool I guess. Short and Sweet. Vince and Flair could have blood and a Shane run-in that backfires to help Vince. It's not for 100% ownership but just a grudge match, a dangerous grudge match where both men bled. Goldberg beating Austin is a Must for me, if Austin just beat the best WCW had to offer it would mean nothing. Austin Stunnering Goldberg, beer-in-Hand, would end the match on a very good note. The Rock VS Hollywood Hogan could play out just as it did at Wrestlemania.
It wouldn't be a face WWE Vs Heel WCW card either. Each group would have mixes fighting for the common cause. Bischoff, Hogan and the NWO could be heel, where as Flair could be face.
I have read so many different thoughts on the InVasion, some good, some very very good, some absolutely awful, but none of them were worse than some of the ideas for the actual InVasion PPV. A Referees match and Shawn Stasiak, Albert, Hugh Morrus and Billy Gunn wrestling at an event that had been built for years? Shocking. I always thought they could do better, one of the decent imaginary concepts I remember was something along the lines of a War Games but instead of 3 teams of 4 or whatever, it had seperate tag teams such as Jericho and Raven (Who didn't want to join either WWE or WCW) DX, Hall & Nash, Sting and the Undertaker, DDP & Booker T. (Austin & The Rock were elsewhere in the story.) It's very easy to get convoluted with these stories and imaginings though. I think my card is pretty well rounded, and if it was real I think only the Battle Royal and Divas match I could miss and not really care, but the Immunity would lead to more and Divas were the best at the time, (Eye candy in WCWs case.)
No matter what matches we add, given the right opportunities, the InVasion could have been much much more.