#4. WWE SmackDown Superstar Big E
Big E and Roman Reigns have been in WWE for a long time and have even risen up the ranks together, going from Florida Championship Wrestling to Friday Night SmackDown.
They've certainly clashed several times throughout that period, predominantly in tag team matches. But perhaps unbelievably in the eleven years since they first set foot inside a ring together, until now, they've never met one-on-one.
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Reigns has paired up with former Shield member Dean Ambrose to take on Big E and one of the other New Day members, Xavier Woods and Kofi Kingston. They've also been in the odd Fatal Fourway and Triple Threat matches together, but never in singles action against each other.
This is a match that could happen though, as there's a groundswell of support for Big E's singles push, with many believing that he should be the one to dethrone the Tribal Chief.