#4 AJ Styles
Yes, we already saw Nakamura vs Styles at Wrestle Kingdom 10 earlier this year in January, and it was incredible. Would anyone really complain if we saw them fight in the WWE?
Styles is a top heel right now on Smackdown Live, and even if he isn’t WWE World Champion, this would still be a feud to see. AJ Styles vs Shinsuke Nakamura at Wrestlemania 33 writes itself, and would be a guaranteed classic if it occurred.
The two showed brilliant chemistry when they versed earlier this year, and with the right crowd and the right pay-per-view, these two could produce a masterpiece.
Also, if given a story to tell in the ring through weeks of build-up and given enough time on the card, this could be a bout for the ages. In my opinion, this could main event any pay-per-view, title or no title.