To put the last part aside, no, I do not think that Cena is retiring, or anything close to it. This is the same scene we saw at last year's Summerslam, as he left his armband in the ring after losing to AJ Styles. I do think that Cena is taking his annual fall sabbatical, likely to go shoot "Transformers," and he will pop up again around Rumble season. That being said, what he did was notable. Cena has fallen into a pattern where after he wins, he will not put over the guy who just beat him. If you look at the feuds with Kevin Owens and AJ Styles, Cena pretended the losses didn't happen, and it wasn't until Cena went over that he finally gave his opponent credit. Reigns is different, for a number of reasons. Cena put Reigns over as much as he could, even on Raw Talk after the show. Why did he do this? Well, obviously because Reigns is different from everyone else. But more importantly, it now leaves one thing left on Reigns' list: winning the Universal title.