#4 Brock Lesnar

The last time we saw former UFC Heavyweight champ – and current WWE Universal champion – Brock Lesnar inside the Octagon was at UFC 200. He defeated contender Mark Hunt there, but then tested positive for a banned estrogen blocker and was subsequently suspended by USADA for a year.
Not that it mattered to Lesnar, as he was heading back to WWE anyway with the Hunt fight being a one-off comeback.
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But in recent months Dana White has been suggesting in interviews that Lesnar might not be done with the UFC just yet. His suspension was up in July 2017 and he hasn’t given any indication that a comeback is on the cards since, but White’s still suggesting that anything is possible when it comes to the former champion.
And there’s no doubt that the UFC would welcome him back with open arms due to his drawing power.
Lesnar is currently contracted with WWE until April, with reports suggesting that they could keep him tied up until August if they choose to do so. But after that, a UFC comeback could definitely be possible.
If he’s going to do it, it’s likely to have to be this year too, as he turns 41 in July. So could one of the later shows of 2018 feature ‘The Beast Incarnate’? You never know.