The thing is, AJ is just a vessel to get some heat for Brock after he sends AJ to suplex city. This might help Roman get some cheers at mania when he meets Brock.
I doubt fans are going to boo Lesnar just for beating Styles. For instance, when Lesnar begins hitting his plethora of German suplexes, fans are going to start cheering and counting just like they always do. Modern fans don't give a damn about the heel/face dynamic to the extent fans did even 10 years ago, they just cheer and boo for who they want to regardless of whether or not it makes any sense. Rather than the "good vs bad" aspect, what tends to draw more cheers or boos is whether or not a wrestler is someone that's more of a WWE type of guy or if it's someone who spent a decade or so on the indie scene. These days, what draws heel heat, I mean genuine dislike and ire from the audience, isn't so much the wrestler as it is the promoter and creative team; if they had Lesnar squash Styles like a bug, fans would be booing sure, but they'd be booing Vince rather than Lesnar. Just look at what happened with the Balor vs. Kane match on Raw weeks back; Balor got squashed, fans weren't happy about it and we turned our ire towards Vince McMahon instead of the villainous Kane.
AJ seems to be just a transitional champ who's gonna get Roman over in the long run.
Reigns is as over, as far as face reactions, as he's gonna get and if Vince hasn't figured that out by now, then he truly is a doddering old fool that's completely out of touch. Reigns is the chosen one, fans know it and a lot of them aren't going to cheer for it because of what I alluded to earlier: Reigns is a product of the WWE machine. Barring any sort of major catastrophe regarding Reigns, fans know, and have known since just after WrestleMania, that the plan is for him to beat Lesnar at WrestleMania.
Nobody really expects Styles to go over Lesnar, people are just hoping that he isn't booked to look like some scrub. Fans will settle for a competitive match, otherwise it'll just be Balor vs. Kane all over again and will probably do more to hinder rather than help Lesnar's next match which, if reports are accurate, may be against Balor at the Royal Rumble. There's not a whole ton of excitement about that match right now because after what happened with Kane, there's fear that Lesnar will demolish Balor in a few minutes with little to no trouble at all.
Jinder, because of his lack of talent and awkward as hell moveset, is the first true heel in many years and if Vince heard the pop AJ got after beating Jinder, he'll make wrestlemania 34 mostly about Cena beating Jinder for his 17th title run. Which means AJ should drop the title soon. Sadly it also means AJ will be squashed, destroyed, dominated and completely digraced to make Brock look like the beast he's supposed to be.
Cena's not going to get that sort of big babyface pop either because Cena is the original Roman Reigns. Cena spent roughly a decade being protected and built up to such a degree that it was actually detrimental to much of the rest of the roster. It got to the point where excitement for Cena matches was lukewarm because fans knew how they would end: Cena overcomes all odds, even if the bad guy cheats to an absurd degree that involves ref bumps, outside interference, foreign objects, etc. and triumphs. A lot of fans, myself included, eventually got to the point where we mostly either just s******ed or rolled our eyes whenever Cena's next challenger would come along because we knew what was what. For me, it wasn't that I had anything against guys like Edge or Orton, it's just that I knew that it'd always be John Cena who came out on top when it was all said and done every single time. Well, almost every single time as Cena's feud with Lesnar is pretty much the only program in which Cena ultimately didn't come out on top. As with Brock Lesnar, fans already know that Jinder Mahal isn't on Cena's level and if they weren't excited to see Lesnar take on Jinder, they're certainly not gonna be interested in seeing him face off against Cena just so Cena can become champ for the 17th time.
Now they may very well go with Cena vs. Jinder, it's entirely possible, but I'm just saying that it's not going to get the sort of response Vince might be hoping for. Then again, maybe Vince isn't all that concerned about that as, if things go down the way they're looking at just this moment, WrestleMania next year will be a show devoted to part timers anyhow. For instance, we'll have Reigns taking on Lesnar and we'll have a Cena match, whether it's against Jinder or not. We'll also most likely have a match with Triple H, we'll probably have a Shane McMahon match, we may have a Kurt Angle match, a slim chance of an Undertaker match and possibly some sort of match featuring Ronda Rousey and the rest of MMA's Four Horsewomen. So, there's 6, possibly 7, matches right there and that's pretty much half the card, plus any other potentially viable part timer/former star who can move around in the ring smoothly enough so that we can't hear his joints creaking Vince can scrounge up.
