#3 Rey Mysterio
This could be one of the best Underdog vs Underdog feuds in WWE history. A high flyer in Rey Mysterio and a crafty wrestler in Daniel Bryan, contrasting styles, contrasting characters. It could be billed as a chance for redemption for Rey Mysterio and emphatically announcing his return to WWE.
Since Bryan will currently be embroiled in a feud with AJ Styles, Mysterio, on the other hand, is likely to get into a feud with Randy Orton. Once both the feuds are completed at the next PPV, Mysterio can set his sights at the biggest gold in Smackdown.
It could be the matchup to prove who is the biggest underdog in WWE with Rey Mysterio aiming to get back to the top after a break from WWE, while Bryan will try to cement his place at the top after only just returning from a career-threatening injury.