It does appear that Frankie is back to acting. Unfortunately, details and reliable information is scarce.
TJ summed up on Twitter about as much as we know for sure:
http://twitter.com/MITM/status/10997562168Frankie's new film is a "Superhero/comedy/action-adventure" called "Pizza Man"
As soon as some more information comes through, I'm sure a news post will be made on the site with all the details!