#4 Battle of the behemoths
Samoa Joe, at present, looks like the most believable opponent for Brock Lesnar and his WWE Universal Championship, now that the monster among men, Braun Strowman is on the shelf. Most internet rumours indicate that Samoa Joe will shock the world by picking up the big win at Extreme Rules and taking on Brock Lesnar at Great Balls of Fire.
WWE has always liked the idea of big men squaring off, and if Lesnar puts his heart into the match, this could be quite a spectacular contest. Two legitimate big men with MMA backgrounds, bashing one another to a pulp inside the squared circle.
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It is extremely unlikely that Samoa Joe will be WWE Champion so soon, and so it makes perfect sense for him to pick up the win and challenge Lesnar at a B pay-per-view. This leaves top contenders such as Roman Reigns and Seth Rollins free to face Lesnar at significantly larger pay-per-view events, such as Summerslam or Wrestlemania.