As Michael Cole said yesterday on RAW, 619 is back in service as Rey Mysterio made his return to the ring after being out since August of last year.
Mysterio was injured during a non-televised live event match against Alberto Del Rio, requiring to undergo knee surgery. He briefly appeared on the Slammy Awards RAW back in December however his return to the ring was delayed after he failed the second Wellness Program test, putting him out of action for an additional 60 days.
Smackdown tomorrow will be from his home town of San Diego, California, and Mysterio is already advertised for a dark match, teaming with Cena to take on Big Show and John Laurinaitis. Mysterio's return was originally going to be held till the RAW 1000 episode however WWE pulled the trigger early and it's safe to say that Mysterio will appear during the Smackdown television tapings tomorrow.