#4. Braun Strowman
Braun Strowman is not finished with Brock Lesnar yet after their last match was ruined by the interference of Baron Corbin, who struck Strowman with the title belt to give Lesnar the advantage before the bell had rung. Unfortunately 'The Monster Among Men' had to pull out of his chance to take on Lesnar one on one at the Royal Rumble due to injury so that 'fair and square' rematch is yet to happen.
Strowman seems to be firmly out of the title picture now, but it's clear ever since the Triple Threat at last year's Royal Rumble that the two have an incredible amount of animosity for each other and were they to clash again in a titanic final match at WrestleMania there's every chance the slobber-knocker between the two big men will eclipse whatever Lesnar Vs. Rollins could have produced.