Paul Heyman sat down with The Sun and did an interview with them. One of the things brought up was about The Rock facing Lesnar. 

“Notice how The Rock picks fights with Bray Wyatt, or fights with Rusev and John Cena? Notice how The Rock doesn’t pick a fight with Brock Lesnar? Is Brock Lesnar ready for The Rock? Is The Rock ready for Brock Lesnar?”

He was asked if The Rock vs. Lesnar would sell out at WrestleMania. 

“I find it insulting that you would say that in front of Brock. I think Brock Lesnar against anyone is an automatic sell-out. Brock does not wrestle 52 Monday’s a year on Monday Night Raw, he does not come to your home town every week, his appearances are rare. They are unique and extraordinary. Which is why, whenever Brock Lesnar appears it is a rare and unique opportunity for the paying customer to see the greatest living athlete in the history of WWE appear live in an extraordinary event that only Brock Lesnar can deliver on. This is why he is the greatest box office attraction.”