The show was recently revived and episodes are now viewable on NetFlix. The episodes started streaming this weekend and almost immediately Twitter was ablaze about episode
As we understand it (we don’t have NetFlix) the story revolves around a low-budget “Fantastic Four” movie, and the show demonstrates how bad it was by showing a snippet of a supposed episode of MST3K in which they Joel and the bots are riffing it. Joel and Trace made voice cameos, making
three four riffs. There is reportedly another brief appearance in episode nine.
Thanks to Andy for the info.