McGregor is reportedly in talks with the WWE to make n appearance at Wrestlemania, in April 2018. Source:
Conor is a huge wrestling fan. His entire persona on stage he has developed from watching performers like Ric Flair and The Rock. These are the top dogs at self-promotion and trash talk. He watched these guys when he was younger. This is something he’s always wanted to do. The WWE guys have asked him to do shows before with them, but the timing was never really right. But this time it looks like a deal is going to be locked into place.
Stephanie McMahon hinted at the news as she praised McGregor and insisted he would do well in the wrestling ring.
I think Conor would be a perfect fit for WWE. He certainly has the personality, the athletic ability, the appeal. He speaks his mind, he is very genuine and authentic and he has a hell of a Vince McMahon swagger.