As we noted yesterday, via WrestleVotes, Rey Mysterio is expected to return at the WWE Smackdown 1,000 special airing later this month, and according to PWInsider.com, that return date is confirmed, and Mysterio will be returning to WWE TV on October 16th.
As noted, Mysterio recently signed a two-year return deal with WWE, and he has an opt-out clause which he can invoke after 18 months.