There were many reports that the movie includes "every Muppet you can think of", but unless they were in deleted scenes I doubt every Muppet was in it. I hardly saw anyone I didn't see in the trailers, and the only scene I noticed where there were so many Muppets you'd have to pause to see everyone was in the trailers. I thoguth mayeb there'd be more characters, out of the frames shown in the trailers, but it's clear there wasn't (maybe there were characters in the crowd of the finale I couldn't see, but I don't think so). If big characters like Doglion, Mean Mama, Timmy, The Bossmen, The Gawky Birds, and Flectherbird were in it it'd be hard to miss them. There are many characters I would think some casual fans woudl recognize (Pops, Boppity, Annie Sue, Foo-Foo, George, Mildred, Hilda, the jugbands, not to mention more Muppets Tonight characters). Hopefully this movie will do good enough at the box office and they'll spend some of the money they make on rebuildiung characters who weren't rebuilt for "The Muppets".
If the YouTube videos come back, I'd like them to do something like the Bohemian Rhapsody video, but only with obscure characters.