#2 Brock Lesnar could insert himself in a WWE Championship program between Drew McIntyre and Keith Lee at WrestleMania 37
While it would be pretty fresh to see Brock Lesnar outside the WWE and Universal title picture, he will most likely return to the world title scene when he is back on WWE TV. The most plausible scenario would see Lesnar insert himself in the WWE Championship match at WrestleMania 37, whether Drew McIntyre has an opponent or not.
One of the most likely WrestleMania opponents for the current WWE Champion is Keith Lee, who has had a turbulent time on RAW since being called up in August. The Limitless One would be an excellent choice to challenge McIntyre at 'Mania, but he might not be the only one to do so.
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Reports have indicated that both, Keith Lee and Brock Lesnar could challenge Drew McIntyre at WrestleMania in a triple threat for the WWE Championship. Lee could get there by winning the Royal Rumble Match before Lesnar simply shows up and gets added to the match because he's Brock Lesnar. It's that simple.
The Beast would instantly be a hated heel as well, attempting to thwart Keith Lee in his attempt to become the WWE Champion. The two of them could tease a future one-on-one match, as they did during their exchange in the 2020 Royal Rumble Match.