In John Cena vs. Roman Reigns, WWE has a mega feud at the ready, a pride's alpha male forced to fend off a hungry young lion looking to supplant him.
That potential collision is one of the company's best options going forward. Other former members of The Shield, a cackling monster and a Swiss strongman offer the company exciting directions to head as well.
A feud worthy of SummerSlam or WrestleMania must have star power aplenty, provide a fresh matchup and create a buzz at just the mention of it. The potential rivalries listed here alongside Reigns vs. Cena all possess those traits.
They also feature enticing potential storylines and in some cases, the two combatants have already displayed chemistry in previous meetings that suggest greatness ahead.
The following list includes a rivalry from Japan traveling to WWE, two men with the same manger locking horns and rising stars look to knocking off the established big names. It's however not a list of dream meetings and so doesn't include Superstars who aren't officially signed yet (i.e. Sting), on a hiatus that may never end (i.e. CM Punk) or are surrounded with questions about whether they will ever compete again like The Undertaker.