I would repackage the guy who probably in WWE's eyes, has the least need to be repackaged:
John Cena.
At Summerslam next Sunday, I'd have Brock and John have a classic match, really can go either way...for the first 10-15 minutes. Then out of nowhere, Brock gets the obvious upper hand and just starts beating the fuck out of Cena, dude's body should be limp when Brock leaves the ring. As a matter of fact have him lose by a 10 count Knockout (I don't know if that is a thing but fuck it, it should be) like how they do in Last Man Standing matches.
On the next RAW, they say Cena has suffered a concussion and is out indefinitely and from then on, you don't mention him again.
On the RAW after the Royal Rumble, you have Cena come out randomly at the start of the 11:00 segment of RAW. He has a long beard, and looks like he hasn't gotten a haircut or shaved in months. Have him do a long, drawn out speech where he does that "I'm dedicated and here every day" bullshit (where eventually people start to not pay attention) and have him announce at the end, that
he is retiring from the WWE to live a quiet, boring life in West Bubblefuck, Massachusetts, USA (I don't know his real hometown but insert that here) and immediately drops the mic and goes to the back, thus getting a classic, trademark Cena, loud yet mixed reaction from the crowd.
That next week, throughout the night, you'd sell the WWE brass trying hard to get him not to retire.
At the 9:00 hour, you'd have a newly babyface Batista. Have him try to convince John that "he has a lot of gas left in the tank". That they came up together in the OVW class of 2003 (because the crowd loves when wrestlers say shit like that lol) and along with Orton, dominated the 2000's after Rock/Hogan/Austin left such big shoes to fill. He says that they are the new legends.
No response from John.
At the 10:00 hour, you'd have The Authority come out. HHH and Steph do the sarcastic thing they do and try to appease John to the point of almost mocking him. HHH says that he'll rename the show WWE Presents: John Cena and Friends. Stephanie says that next week will be John Cena Appreciation Week. They say that they will make the whole roster come out and get on their hands and knees and beg him to stay. They say they will fund another rap album from him. Stephanie says that she'll do
anything for him to stay (in a provocative, suggestive, seductive way), and HHH isn't amused. He thinks she took the joke too far and the crowd is wild with laughter and whistles. They walk to the back with HHH angry at Stephanie.
No response from John.
Then at the 11:00 hour (after you had been selling "What's Going On With John Cena" all night), Vince McMahon comes out. He says that he's "not going to let this happen again" (referencing Punk). He says that he's going to cut to the chase and that if Cena doesn't come out and return to action next week he will sue him for everything he's earned. He starts to leave but then walks back to the ring. He says that he's Vincent Kennedy McMahon, damnit. He says he wants Cena out here right now. He starts to go on a tirade about how he's made so many stars and they are all ungrateful and try to leave:
John Cena - retires out of nowhere
CM Punk - leaves to go bitch, moan and watch hockey at home
Brock Lesnar - leaves to go play football and when he's not good enough to do that, becomes an UFC fighter
Stone Cold Steve Austin - takes his ball and goes home
The Rock - leaves to make crappy Hollywood movies
His Own Damn Son - Gave him everything he owns, the keys to the WWE Empire and he still turned his back on his father.
Hulk Hogan - leaves to go to WCW after he made him an ico-
Hulk Hogan's music hits and he goes to the ring and squares up face to face with Vince. He wants him to finish his sentence and Vince is backing down, backtracking from what he was about to say.
Hulk says that's what he thought and he says he knows what will get Cena back. He challenges Cena to a match. Cena music hits, he comes out, goes to the ring and without grabbing a microphone or saying a word, he shakes Hogan's hand and the match is set for WM31:
Hulk Hogan vs. John Cena
Basically over the next couple of weeks, they sell the match as a respect/generation thing, Cena says it's an honor to step in the ring with a legend, the announcers build it up as the typical Lebron vs. Jordan; Ali vs. Tyson shit.
They make a big deal out of it being Cena's last match. They come out with a new Yellow and Red tee that says "Cena's Last Match - WM31 - (Date of Wrestlemania) - End of An Era". He goes on a big promotional run on talk shows and shit selling the match, building it up as his last match.
The match comes, it's WM31. When Cena comes down the ramp he gives his autographed "Cena's Last Match" shirt to a kid in the front row.
*
The bell rings. They do the shit that Rock/Hogan did after their match to start things off. They do their signature poses. Cena with the U Can't See Me, Hogan with the hand to ear thing to all four sections of the crowd. They do this for about five minutes, crowd is getting restless (I'm sure you are too if you read this whole thing). Hogan sticks his hand out for Cena to shake it.
Cena waits for a minute, he smiles like he is about to cry tears of joy, and then
spits in Hogan's face.
Before Hogan even has a chance to react, Cena is on him and beating the fuck out of him. Crowd goes wild with confusion. He's grounding and pounding him and beating the shit out of dude. He throws him out the ring and starts hitting him with chairs and shit. Cena is disqualified but he doesn't give a fuck. He puts Hogan through the announce table, spears him through a barricade. Beats him to a bloody pulp. Security and shit comes out. Referees throw up the X to really sell it.
Cena goes up the ramp and almost goes to the back. But he comes back and spits on Hogan on the stretcher again. He goes and finds the kid he gave his "Cena's Last Match" shirt to. He takes it, blows his nose with it, and throws it in the dad's face. The dad wants to fight Cena but Cena is already backed up onto the ramp and going to the back. (Obviously this would be a planted family).
*
The crowd is shocked.
The next night on RAW at the 11:00 hour, have Cena come out with facial hair stubble (Like Hogan had in his nWo days) and all of his hair dyed black. Have him say that last night, looking at Hogan he realized he doesn't respect him. Because Hogan didn't have to go through the 21st Century nerdy wrestling fans. He says he didn't have to go through appeasing to the wimpy bitch ass kids who couldn't handle bullying. Cena says that he is now on a mission to be the greatest of all time and that he has another 10 years to go. He says that his only mission is to make sure that in 100 years, when people think pro wrestling, they think of
"The Blueprint" John Cena (his new attire is now blue MMA shorts and MMA tape around his feet, because I'm tired of seeing those fuckin jean shorts) and that he's going to start by breaking Ric Flair's world title record.
Bam, now kids hate him, the purists/IWC hate him (even more) and you've got a new mega heel and just breathed life into one of the most stale characters in the history of WWE. Maybe you can start a stable or something with Cena as the head to get a few talents over.
Damn I just typed all that shit out at 6 in the morning I need to either get hired by a wrestling company or go get some pussy.
for all the effort put into this! And as you mentioned it doesn't have to main event, keep it on the midcard so no one expects Cena to flip. Fans are just expecting a boring match but what they get is a bloodbath.