#4 Roman Reigns vs. Seth Rollins vs. Dean Ambrose

Out of these alternative main events, this is the only match to have already happened on a PPV.
The problem then, at Battleground 2016, was that their triple-threat match was hastily put together following Seth Rollins’s return from injury and only had a short amount of build-up.
If this match takes place at WrestleMania 34, it would have eight months of build-up, beginning with a mini-Shield reunion, then a full Shield reunion, and a culmination of the storyline at “The Showcase of the Immortals” to determine which Hound of Justice truly is the best man inside the squared circle.
It’s safe to say Reigns doesn’t need a major win at this point for fans to realise he’s the future of the company, but a WrestleMania main-event victory for Rollins or Dean Ambrose would go a long way to reviving their careers as singles stars.