A nice little Muppets movie. Lots of cameos.
The plot kicks off at the end of the previous movie; the Muppets reunited after many years. (As Kermit would say: Yaayyyy!) But what do they do next? Instead of following Kermit's wise counsel to take it slow and hone their craft, the rest of the gang gets taken in by the shrewd conniving "Dominic Badguy" (Ricky Gervais) and go on a world tour.
But—little do they suspect—Dominic is the co-conspirator of Constantine, the most dangerous frog in the world, recently escaped from a Siberian gulag. (Apparently they still have those.) Constantine bears a close resemblance to Kermit, and before you can say "I bet I know what's going to happen next", Constantine has taken Kermit's place and Kermit has been hauled off to Siberia by Gulag warden "Nadya" (Tina Fey).
So while Dominic and Constantine use the Muppet tour as cover for a series of brazen heists, Kermit attempts to deal with his new life as a Zek. (His fellow inmates include Danny Trejo, Ray Liotta, Tom Hiddleston; Stanley Tucci plays a guard.) As you might expect, hijinks ensue.
There's some funny stuff, and (darn it) I like these guys. So, while it lacks the inspired lunacy of Jim Henson, I still had a decent time.