#4 Conor McGregor
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It just had to be, really. Conor McGregor is the biggest star in MMA today and anyone who doubts that clearly doesn't browse the internet very often. The Notorious One has created a legacy for himself during his last few years in the company, and it's no surprise that WWE has been sniffing around for a future appearance from Conor.
After all, who wouldn't want to get a piece of that publicity?
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Depending on who is in the ring at the time, McGregor could be a welcome addition to the Rumble match. The majority of the crowd would go mad upon seeing him walk down the ramp, and the unpredictability of what he would do and who he would go after could make for some marvellous viewing for the WWE Universe.
If Vince wants this to be the best Rumble of all time, this is one way to accomplish that. From the Lightweight division to something a little bit bigger.
