The reason there's no continuity is the same reason I talked about the caliber of opponents. The story of the HBK/Taker/HHH feud is not the story of the streak in any way. When they wrestled Taker year after year, there was a need for continuity because it was the same person fighting, with the same amount of impact, the same concept, the same moves, the same strong points, the same personalities, so you needed to take it to another level. With another guy it's a different story. What people don't get is the fact that the moment the program is over, the process during it is over. Your argument is basically that in 2002 for example, after Brock killed Taker in a brutal HIAC, Kurt Angle is not believable to wrestle Brock in a match, Lesnar needs to wrestle his entire career in NODQ matches with his opponents trying to kill him with chairs because that's the only way to beat him if Taker wasn't able to do it in a bloody cage match. You see how flawed this mindset is? I have no doubt that the crowd was completely into the WM28 match, I never said they weren't, hell, I was into it all the way. What you're saying about the fans seeing an "evolution" in the streak match therefore will not believe a nearfall is not the case. They're not going to believe a nearfall that they already saw 10 times in 4 years, like Taker taking a SCM or a Pedigree, which is why in THEIR evolution of matches, they needed to take the match to another level with weapons, special ref, cages etc. Will the audience buy a first time ever Rock Bottom/People's Elbow combination on Taker after a grueling match, something that pinned Hulk Hogan clean? Absolutely, and I'm willing to bet that it will be the biggest eruption in the history of the streak, maybe only with HHH's tombstone and Shawn's SCM after the table spot at WM26. Even then I doubt it. As for an indicator of believability and the fact that the fanbase wouldn't pay to see a predictable outcome, I can definitely see Rock vs Undertaker drawing much bigger than Brock and Cena against Taker. You put the slogan of Rock saying that Team Bring It has only one goal left to do and that's ending the streak, and that Taker never faced an opponent in the caliber of Rock and who HE beat at WM to stand there as the GOAT. That alone will create an astronomical buzz, interest and bigger attraction than anything they can do with Lesnar or Cena. Cena is not turning heel BTW, I don't know why people still making plans and booking him like that when it's obvious that it's not happening for many reasons from Vince and Cena himself. Even as a heel, Cena was never a industry changer at his peak as a babyface, as a heel he will do the same thing, just with different attitude and will lose his only bigger than usual drawing power which is merchandise to his kids fanbase.
Both times he has done the kip-up on live TV he needed help from the guy he was facing and then obviously that one he did against Miz failed, you can give whatever excuses but he botched it. It's not a big deal anyway, I doubt there are many 260lb 40 year old men who could still do it after 7/8 years out the game
It wasn't really a matter of help, he did it a lot in the past:
Rock said in one interview that he watched a lot of his matches before WM28, this exchange along with the crossbody is one of the moves he took from that Rocky Maivia era.
Obviously he can't do it easily like he's 28 again but he did it a lot of times in the past year so he can do it, you can't use a rare slip as an indicator, shit like that happens, especially in the first time in almost a decade, take RVD here in 2006 when he was full time:
It's a cool spot but it's not make or break. You're going to see another next year in one of his matches, 100%, especially in the current shape which was closer to 2002 with the way he bumping on RAW 1000.