So the Rifftrax Kickstarter sent out a notice that they have a big announcement next week about the effort. They said it isn’t a second movie (drat!), but they are adding something new and exciting and different. So, speculation?
My ideas:
My guess (that I already posted on the update):
Every backer at $100+ will receive an officially licensed Kevin Murphy whisker, complete with official signature and COA (not valid outside USA, Mexico or Canada, and invalid within all of North America)
First thing I thought of was the official announcement of their Gizmoplex live event (what movie they’ll cover and if they’ll have any direct cross-promotion with Joel or the cast/crew). I could be wrong, however…perhaps it’s a(nother) MST3K or Mads crossover on the Rifftrax end??? 
New episodes of The Film Crew made for the Gizmoplex.
Wow, I would love that. Hmm… The Film Crew… whatever happened to those guys?
I’d love to see the Rifftrax event be a MST3K Reunion 2: Non Electric Boogaloo Reference TBA.
Get all the people back from the 2016 live show, along with J Elvis, the rest of the Netflix crew and the live cast.
I would HOPE that it’s something related to the current MST3K incarnation, but I’m not making any guesses.
Fancy Headdresses for all!!
Rifftrax The Musical
They’re launching the RiffMoPlex, an immersive theater environment for their VODs and shorts.
I could see them announce that if just for the lulz.
Don’t tease me like that. I’ve been hoping for them to come out with an apple tv app that I could watch all their VODs on for years!
I hope the concession counter has Wiener Wraps.
There’s a Roku app for that - I’m surprised there isn’t an Apple app.
Remember Dave Gallinson from high school? Well he’s back, in corporate overlord form!
Rifftrax: The Movie
Rifftrax: the movie: Mst3k: the movie
Kevin: “Man, whoever voiced Servo is really phoning it in.”
Mike: “Yeah, this character Mike Nelson’s really giving a bad name to Michael Nelsons everywhere.”
Bill: “And who’s this Forrester guy spanking himself? I already like him way more than this ‘Brain Guy’ I keep hearing about, yeesh.”
Mike: “Don’tcha think Forrester and Crow sound kinda alike, though?”
Bill: “Crow’s the one holding this snoozefest together. If he and Forrester sound alike, GREAT! I’d rather listen to THEM all movie than those OTHER two clowns.”
Mike/Kevin (talking over one another): “yeah/true/for sure (etc).”
“Yknow what this movie needs?”
“To end already???”