Brock Lesnar brutally attacked Rey Mysterio and his son Dominick to kick off this week's episode of Monday Night Raw, with the latter having to be taken away in an ambulance.

Mysterio was interrupted by The Beast Incarnate during his opening promo, and after Lesnar attacked the future Hall of Famer - he shifted his focus towards Rey's son. Dominick was seated front row and obviously wanted no trouble with the former Universal Champion.

But that didn't stop Lesnar from savagely attacking the aspiring professional wrestler for several minutes. Just when it looked like he was done, Lesnar kept returning to attack Dominick even more.

It's been reported that UFC star Cain Velasquez is talking to both WWE and AEW about a contract. Well, Dave Meltzer of Wrestling Observer Radio (h/t Ringside News) explained that the Lesnar segment with Mysterio and Dominick could lead to a feud with Velasquez - who defeated Lesnar at UFC 121 on Oct. 23, 2010 via TKO.

Meltzer explained that Paul Heyman's promo "about tough guys and mixed martial arts" was aimed at Velasquez. Even though the latter hasn't signed with WWE yet, Meltzer said that Lesnar vs. Velasquez is "the destination in theory that this is headed toward."

Related: Brock Lesnar Won't Be Part Of Raw Anymore [Rumor]

via John Locher/AP

Now, Meltzer emphasized that the whole storyline may not end up happening, as Velasquez is no guarantee to sign with WWE. But should he come aboard, Heyman and company have at least began building towards a feud with the two UFC legends.

Velasquez competed in his first wrestling match for the AAA promotion at the Triplemanía XXVII on Aug. 3, and he has another bout for the Oct. 13 show in Los Angeles. After that, it's anybody's guess where Velasquez ends up - but we know there's one WWE superstar who's waiting.

Lesnar vs. Velasquez Would Be Must-See TV

Velasquez's fight with Lesnar at UFC 121 is one of the most memorable in the company's history. It would be something of epic proportions if these two world-class athletes went toe-to-toe in the square circle. That said, AEW is also in the running to land Velasquez - and it'll be exciting to see which company comes ahead in the sweepstakes.

Next: Becky Lynch Asks Mick Foley For Brutal Advice Ahead Of Hell In A Cell