Over the past couple of years, WWE and UFC have been working closer than ever before.
We've seen Ronda Rousey make a WrestleMania appearance, we've seen Brock Lesnar pull double-duty inside the squared circle and the octagon, and we've also seen CM Punk depart WWE for UFC.
With plenty of people having plenty of different opinions regarding the relationship between the two companies, it's certainly something that won't go away anytime soon.
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In fact, there is already talk about WWE signing Rousey on a permanent contract once she retires from UFC, which she has revealed is sooner rather than later.
With Rousey possibly swapping the octagon for the squared circle, Forbes recently asked a former WWE superstar how he felt about the growing relationship between the two organisations.
Edge, who retired from WWE a few years ago due to neck injuries, has had his say on the relationship, and he believes they are two very similar companies who can benefit from using each other.
When asked about the likes of CM Punk and Lesnar going into the octagon, and Rousey appearing at WrestleMania and also potentially joining the company full time, Edge said: “I think they’re different branches on the same tree.
"But I think the same about football or any other athlete switching industries. I don’t think it hurts or helps for people to hop back and forth.
"Whatever blows your hair back. It’s a wash.”
In recent weeks, there has already been reports about WWE trying to get a UFC star to appear at 'Mania 33, with Rousey near the top of their list once again, along with Conor McGregor and Paige VanZant.
It's obvious that the relationship between WWE and UFC will continue to grow, but it will be interesting to see whether more names swap one for the other over the next few years.