3. Daniel Bryan

Daniel Bryan being the mysterious attacker won’t be a surprise to many fans. He’s been doing crazy stuff since joining forces with Rowan. Moreover, he’s been really weird since losing the SmackDown Tag Team Championship to The New Day at the Extreme Rules pay-per-view.
Bryan trying to take out his frustration on Reigns could be an angle WWE might be planning. Besides, both wrestlers don’t have an opponent at SummerSlam, so we may get to see the two face off at SummerSlam.
The Big Dog facing Bryan would be something fresh for the fans to see. The two faced off last time back in 2015 at WWE Fastlane, for an opportunity to face Brock Lesnar at WrestleMania 31 for the WWE World Heavyweight Championship.
Besides that, Bryan and Reigns developed great chemistry when Reigns was in The Shield. WWE can use that chemistry to start a new rivalry between Reigns and Bryan.
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