From his interview with Sporting News:
“I mean, how can you forget something like that? Your debut and not only did you debut in WWE, but it was at the Royal Rumble and the WWE Universe went nuts for it. I don't know if I can ever top that. I'm going to give it a shot, but I don't know if I can ever top it.”
Considering it was his debut, it was in Orlando, he was treated like a God by the fans, and the absolute shock of his finally making it to the big time, Styles is right -- it's going to be damn near impossible to top that night. He's already been involved in a number of incredible matches, worked multiple main event angles against the top stars in the company, and even chased the championship.
There aren't many rungs left on the ladder. His next feud could be his biggest, as he'll headline the next WWE pay-per-view, Backlash, in a WWE world heavyweight championship match against current titleholder Dean Ambrose. He's coming off a clean victory over John Cena at SummerSlam in the clear "Match of the Night" and he has been, without question, the best performer in WWE throughout all of 2016.
If there was ever a time to put the belt on him, it's now. But even then, would that top his Royal Rumble?