Well this could get interesting in a hurry.
According to Dave Meltzer of the Wrestling Observer (subscription required), WWE likely changed their plans for the main event of the August 20 SummerSlam pay-per-view show a few weeks ago, and it now looks like the scheduled match for the show will be Brock Lesnar vs. Roman Reigns for the Universal Championship.
Meltzer noted that the plan could still change, as WWE has been impressed with Samoa Joe during his current feud for the Universal Championship. However, the original plan of Lesnar vs. Braun Strowman is likely off the table.
The original plans were likely calling for Lesnar to hold the Universal Championship for a full year after defeating Goldberg for the title at WrestleMania 33 in Orlando. The expectation was that Reigns would eventually get his long-awaited rematch with Lesnar at WrestleMania 34, where Reigns would eventually win the championship. It looks like WWE is going to accelerate those plans, as Lesnar being off television for such long periods of time with the title hasn’t done much for television ratings like it did between 2014 and 2015.
The likely thought is that the changed plans would now lead to Roman Reigns vs. John Cena at WrestleMania 34 in New Orleans. With Cena taking on a more part-time schedule in recent years, there’s a chance that WWE wants to get this match out of the way before Cena either retires from wrestling, or before the match goes out of vogue. Reigns and Cena — two of the biggest stars in the company — have never faced off one-on-one at a major show.