Muppets Most Wanted (2014)
Ugh, just awful. Just like the film that proceeded it, it was far too self-aware and packed to the gills with blink and you miss them "celebrity" cameos.
None of the Muppets are given any time to shine. Most that do get to speak get a single generic line that could've been said by anyone. The Muppets thrive on their unique personalities but here they're mostly used as living set decoration.
Now, the original films had their share of cameos but they were done with some class and respect. Take this great scene with Steve Martin. Today he'd be on the screen for five seconds and maybe get a single line.
The greatest problem with these films is that they're in a big rush to go nowhere. They're given absolutely no breathing room to allow for any characterization or genuine moments. They just plow forward as quickly as possible to get as many cameos in as they can before the credits role.
Lastly, the songs are pretty terrible as well. I love Bret and the Flight of the Conchords but that style just doesn't jibe with the Muppets. It was so bad that they had to resort to recycling one of their classic songs to end the movie because they just weren't up to the task of coming up with something new and memorable.
Like the rest of the film, it's all pop and no heart.