To say that WrestleMania season is on in full swing would be an understatement. Various feuds and long-term storylines are all set to round off at the show of shows in New Orleans and fans are hoping that WWE will throw in a few surprises leading up to the PPV on April 8th.There is no better surprise than an unannounced return and the company needs a handful of them to spice up the proceedings before Roman Reigns eventually wins the Universal Championship.In this article, we take a look at the big-name superstars who can be on their way back to the company while also focusing on the ones who will probably be sitting on the sidelines this time around:May return: Rey MysterioReturning as a part-timer?The growing murmurs of the legendary luchador returning for another run have picked up steam in recent weeks. From a potential match against John Cena to a part-time contract, with negotiations supposedly having kicked off with Triple H himself, the rumor mill has been relentless.The hype generated from his Royal Rumble appearance has convinced the WWE of the former WWE Champion's value at the ripe old age of 43. Hopefully, WWE comes up with a more logical opponent for Mysterio and not the Cenation leader.