#4 The Rock vs Vin Diesel - WrestleMania 33
The Rock is arguably one of the biggest stars in the entire sports entertainment industry and remains a headlining rumour every time the WrestleMania season begins to kick off.
The Great One was heavily slated to clash with his Fast and Furious co-star Vin Diesel at the Grandest Stage of Them All in Orlando which would have reportedly elevated the hype for their movie. There's no denying that Vince McMahon has always entertained the idea of garnering massive mainstream attention through his incredible business acumen.
Considering the fact that there were rumours of the Rock having some apparent heat with Vin Diesel during their time on Fast and Furious, there were plans for an epic showdown between the two at the Showcase of the Immortals.
While the plan eventually got scrapped for reasons unknown, the Great One hasn't returned to the squared circle for an in-ring bout since WrestleMania 29 (barring an impromptu match against Eric Rowan at WrestleMania 32), and with the company constantly wanting a headlining clash for the biggest event of the year, it is likely that the former WWE Champion would show up to electrify the crowd, one day.