1. CM Punk. Would have main evented WM, not that "Twice in a Lifetime" bullshit.
2. Wade Barrett. Would have booked him in feuds with both CM Punk (who stole his faction) and Chris Jericho (his NXT mentor).
3. Rey Mysterio - he would have kept the title instead of Cena taking it from him for the Punk/Cena feud. Which ended up being the Rock/Cena feud. Or Rey would have lost it but Cena became heel - because let's face it, giving himself a title match against Rey who just competed for the title and won that night is a fucking heelish move.
4. Bayley. She would have beat Charlotte at WM instead of some B pay per view. And she would have beat Alexa too, at least in their first match.
5. Bray Wyatt. Would have won at Mania, and Jinder would have never been champion by taking the title off Orton.