In an update on a previous report on the rumor of Brock Lesnar possibly returning to UFC at the year, Pro Wrestling Sheet has been able to confirm the reason Lesnar is re-entering the USADA testing pool for MMA is because his WWE contract expires not long after WrestleMania 34 next year and he’s already told WWE officials he doesn’t intend to re-sign and by entering the testing pool he can keep his options open for a return to MMA.

Pro Wrestling Sheet also notes that Lesnar returning to The Octagon in November for the UFC event at Madison Square Garden isn't true.

Lesnar has to re-enter the testing pool and fulfill the rest of his suspension before he’s allowed to fight in UFC again, according to Fightful.com’s Sean Ross Sapp.