Kermit & friends go to Manhattan to put on a musical and first run into a crooked producer who, when police arrive, takes Gonzo and a Chicken hostage. Though slapstick and cute for grown ups, the violence-- putting two harmless Muppets in physical peril, and used as the introduction to producing a play in NY-- set an undercurrent of fear for my 5 year olds. In addition, the scenes following have the Muppets getting repeated rejections from other, simply uncaring producers. These first segments show the Muppets living in lockers, being held captive and rejected, while going hungry. All with very few positive reinforcements.
And that's where we stopped watching. Yes, I know that's not the entirety of the film, but as a writer, I'm always appalled at this sort of easy out to create conflict.