SummerSlam 2021 certainly feels like a marquee event that John Cena’s presence would send over the top, especially since he hasn’t wrestled since WrestleMania 36.
In any case, WWE fans should be encouraged by the fact that Cena has publicly acknowledged a return, and said it could happen.
As mentioned though, the nature of his contracts and potential acting jobs could make that appearance a no-go.
Luckily there are plenty of other big pay-per-views where he could appear later in the year after Peacemaker is finished filming, so it’s not like his return has to happen at SummerSlam, as nice as that would be.