#1 WWE and AEW could try to sign Brock Lesnar
Brock Lesnar usually signs short-term deals for big-time cash. It's what he has done for years with WWE and UFC and it has made him a very rich man. His contract expired earlier this summer as he has not appeared on any WWE programming since WrestleMania 36.
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The Beast is usually only used a few times a year for big PPVS like WrestleMania, SummerSlam or the Royal Rumble. He's also been a fixture at the Saudi Arabia shows due to his name recognition.
The landscape of WWE has certainly changed a great deal due to WrestleMania, the pandemic and the recent WWE Draft. Lesnar could be eyeing a short-term return to the Octagon and the UFC if the price and opponent are right.
It was reported that despite being a free agent, he wouldn't likely sign with any other wrestling promotion but WWE. He might go to the UFC, but WWE would likely have the best chance and likelihood at signing the Beast to a deal. AEW could pursue him, but they'd be better served growing the younger stars they've featured heavily like Darby Allin, Jungle Boy, and Orange Cassidy.
When crowds return and WrestleMania/Royal Rumble season heats up, we might see the Beast back in action in a WWE ring.