Luis Urive, the former Sin Cara in WWE and known previously as Mistico, is scheduled to return to the ring on 2/1 in Mexico City to celebrate the first anniversary of his Sin Cara Gym. His contract with WWE has expired and the role of Sin Cara is now being played by Hunico (Jorge Arias) in WWE. What makes the appearance interesting is that he will be wrestling under the name on the card as Sin Cara.
Sources: The Wrestling Observer/Figure Four Online, PWInsider.com