Watched it again on Sunday night. On my fourth viewing, over a year after it finished its theatrical run, I still get a kick out of it. It's fun, snappy, inventive and colourful, with a lot of heart to boot, and I still sing along with most of the songs. (I'd like to smack the film critic who dismissed the music as "instantly forgettable" or similar nonsense.)
A few stray observations:
(1) Animal is the first to recognize Constantine isn't Kermit ("Bad frog!"). So I wonder if he deliberately staged an hour-plus drum solo in Madrid to sabotage Constantine and Dominic's plans.
(2) The gulag prisoners figure out Kermit isn't Constantine because he says "thank you" while accepting the prison crown (a joke that I actually find funnier with each viewing). So does that confirm that Nadya knew the frog's true identity all along, and delivered her "as far as the authorities are concerned, you are Constantine" line as part of her plan to have her favourite frog locked up and under her watch for a good, long time?
And, from a personal standpoint, is anyone else finding it easier to watch the movie now that the Muppets have a new TV series and we don't have to worry about whether MMW's box-office take had the potential to condemn them to cold storage?