Four WWE superstars are unofficially in the running to be in the main event of SummerSlam 2017 on Aug. 20. The biggest match since WrestleMania 33 will be determined Sunday night at Great Balls of Fire 2017, WWE's next "Monday Night Raw" pay-per-view. Great Balls of Fire 2017 is scheduled to start at 8 p.m. EDT, and the pre-show gets underway at 7:30 p.m. EDT. Ordering the event on PPV costs $54.99, but fans can also watch the event with a live stream on the WWE Network. A subscription to the network costs $9.99 per month, though new subscribers get the first month free.

SummerSlam is still more than a month away, but WWE has its biggest pay-per-view since WrestleMania 33 set for Sunday night. Great Balls of Fire 2017 features a stacked card with several intriguing matches. It'd be stunning to see Joe beat Lesnar and win his first title on the main roster. That doesn't mean it's not a highly anticipated match, and the build towards Sunday's main event has been better than any of Lesnar's recent feuds. Even if Joe does get pinned to end the PPV, he should find himself near the top of the card at SummerSlam because of what he's done in the weeks leading up to this WWE Universal Championship Match.