I have to say the Taker vs. Cena match really doesn't seem to make sense anymore. If the Deadman is going one more match what good would it be for him to beat or lose to Cena. It would make much more sense for Taker to put over a young talent at what should be his last Mania. Maybe Reigns and this is where he turns heel? Following the Summerslam match I would build up to a Styles - Cena clash again at WrestleMania. This card would look pretty nice on the books I think.....
Brock Lesnar vs. The Rock
Seth Rollins vs. Finn Balor (Universal Title)
AJ Styles vs. John Cena (WWE Title)
Undertaker vs. Roman Reigns
Dean Ambrose vs. Randy Orton
The Club vs. Owens/Zayn (Raw Tag Titles) - After Owens loses the Title a reunion with his old best friend could make for a nice paring.
Banks vs. Bailey (Raw Women's Title)
Nia Jax vs. Becky Lynch (Smackdown Ladies Title)
Rusev vs. Cesaro (US Title)
New Day vs. Wyatt Family (Bray, Harper, & Rowan) - Cross Branded Match
Pre-Show
Andre Battle Royal - Final 2 (Big Cass & Stroman)
Charlotte vs. Asuka
Ideally, if the streak was to end, I would have preferred it to be someone like a Seth Rollins, Kevin Owens, Finn Balor or someone along those lines. You know, someone to whom it would truly mean something. Since the streak is gone though, Taker's matches are still about making money and it'll be about getting the biggest names they can for said matches. The only way it turns out to be a younger guy, and said guy is put over, is if it's someone that WWE is
REALLY behind for the long haul and trusts. As of right now, that's not Roman Reigns. Reigns will be a top player in WWE for years to come, but top officials will never potentially see him as
THE guy again in my opinion because while it can be embarrassing to a wrestler's career to fail a WWE drug test, it's infinitely worse for said wrestler and it's an embarrassment for the company itself when that wrestler happens to be WWE Champion at the time. I agree that putting Reigns against Taker could be used as a means of a heel turn, one that could work if the intensity and storytelling is there.
As for the proposed card, most of it sounds pretty good to me . However, I have zero interest in watching the Clash of the Mercenaries, AKA Rock vs. Brock. I'm bored with Lesnar and have been for a while and while I'm sure Rock vs. Brock would draw, I think it'd be one piss poor bout.
I also don't think I'd be all that interested in seeing Styles vs. Cena at WrestleMania for the WWE Championship. I know it'd be a helluva match, but I also know that such a match would almost certainly result in Cena winning his 16th World Championship considering that Styles is 2-0 against Cena in 1 on 1 matches. I've enjoyed Ambrose's run as champion, so possibly having him go up against Cena could be fun and could be an interesting means of seeing how invested they are in Ambrose as a long term main eventer.
Also, pairing Zayn & Owens up anytime remotely soon just pisses all over continuity given how heated their rivalry has been in NXT and the main roster. I'm of the opinion Owens should be champ for a good long while, maybe even up to WrestleMania; I'm not even sure Finn Balor will be back in time for WrestleMania and shoehorning him into the title match just leaves a bad taste in my mouth. I like the guy, don't get me wrong, but he was given a huge opportunity and he got hurt; it's nobody's fault really, but WWE gambled on him and they came up short. Also, Charlotte vs. Asuka should most definitely not be on the kickoff show if such a match did happen. Personally, I'd put Asuka on SmackDown Live, Nia Jax is on Raw, and SmackDown Live needs the star power more as it'd even things out a bit more when you consider three of the Four Horsewomen are already on Raw.