So as much as i can't believe I'm saying it myself, this whole feud up to this point has been terrific. Miz has taken what made him the M.V.P talker of 2016, and turned it up even louder, while Maryse showed on Smackdown she can hold her end of the bargain. Cena as usual brings it when he's motivated to make things work, and Nikka Bella is....well...Nikki Bella.
So how do you book the actual match? Cena's off filming for another movie as soon as Mania wraps up, so it seems stupid to me in letting him get the win. Miz on the other hand has got to be getting a World Title run in 2017, between his Mic work and improved ring work, the man clearly should get a 2nd chance at the top.
So here's what i propose, at WrestleMania, the Miz pins.....NIKKI BELLA! The match is a mixed tag team match, and if i were WWE, i'd not make it too clear about the man vs woman aspect of the match. Leave it in the air and allow the fans to assume its the usual man vs man / woman vs woman rule. Then in the match, Miz can blind tag in from Maryse and when Nikki isn't looking, nail her with the Skull Crushing Finale.
First off, its pure heat for Miz, who on the grandest stage of them all pins a woman to get his moment. It worked for Edge 10 years ago when he pinned Beulah in his mixed tag match involving Dreamer, Foley and Lita. Its a despicable cowardly move that Miz would thrive off, and it makes his cowardly heel act even better, because unlike most heels, Miz isn''t trying to get "Cool Heel" status, he tries to actually get fans to hate him, and this is the perfect way. Not to mention it means Cena doesn't take the loss. Just watching Miz proclaim every week how he beat "Team Cena" while we all know he pinned a woman, would make his shit eating grin even more perfect.
(Sidenote - As much as WWE don't endorse man vs woman stuff, they let Roman spear Stephanie last year at WrestleMania, so obviously there's leeway somewhere on Pay Per Views).
As for after the match, fantasy booking maybe, but I'd have Cena propose to Nikki andin response, she slaps him while he's on one knee and walk out on him. Nikki is such a better heel than face, and her turning on Cena when he's at his most vulnerable would be perfect. She can go on about how her man never protected her in the match, and how she hated how he never really lover her (the usual stuff). Cena can return months later with a 1 on 1 feud with the Miz, ready made for SummerSlam maybe.
And to top it off, assuming she can still go in the ring, I'd have Maryse enter the Smackdown Woman's title match later on and get the win. She's a great mic worker, something WWE woman always struggle with, and Maryse with the Woman's title and Miz eventually with the World tile would be a great combo for Smackdown to have.
The dynamics of the womans roster would also look a lot better! The heel side of Maryse, Nikki Bella, Alexa Bliss, Carmella, Eva Marie whenever she turns up, and the faces of Becky Lynch, Mickie James, Naomi and possibly Natalya (who needs a major character overhaul).