#5 Jeff Hardy
It is pretty surprising that Jeff Hardy is in this match given the fact that he has not done much all year. He has only appeared on 2 episodes of SmackDown Live all year. However, he is a former WWE Champion so that makes it more likely that WWE trust him to be the top superstar of SmackDown Live heading into WrestleMania than someone else like Mustafa Ali.
Jeff Hardy looking to have one last main event run in his career would also be a great storyline and he arguably should eventually win the WWE Championship one last time in his career. One last match between Jeff Hardy and Samoa Joe at WrestleMania for the WWE Championship would not be the worst thing as they had a great rivalry.
However, Jeff Hardy still has no close to no chance of winning this match due to the fact that WWE has not booked him strong enough in the past few months to justify him becoming WWE Champion.