In an update from Dave Meltzer regarding why Brock Lesnar has not signed a contract with any pro-wrestling promotion, it could all be down to timing.

Lesnar seems to be holding out to 'raise his value' as competition increases few months.

"He [Lesnar] also has not been in negotiations with WWE because of the idea it’s not smart timing for what is likely a Mania in 2022 through 2024 to make a deal now when the competition is likely to only raise his value and the money he could get when they want him and when he wants to come back for maximum interest."

FULL MATCH - The Undertaker & Kurt Angle vs. John Cena & Brock Lesnar: SmackDown, Oct. 2, 2003