I was disappointed in this sequel. It started out with an interesting premise with Guy's back story, but it only held there for a minute; maybe two. After that, it just went to heck in a hand basket. The story was really weak. For some reason, they were still on the hunt to find "Tomorrow," when the first movie implied that the found it.
For one thing, why is there always a soundtrack in animated features? Disney owns that market - they can pull it off; most other animated features can't.
For another, while the idea of the Betterman family was interesting, all of this slowed down the movie. The first movie was an adventure; this movie was a sitcom. A boring one, at that. I can't for the life of me understand why the Bettermans wouldn't explain the banana thing. The "modern" conveniences took away from the fact this is about characters from or near the end of the Neanderthal period. Why would there be flushing toilets and elevators? Yes, I know it's a cartoon, but none of this made any sense.
The "Thunder Sister" thing. Uh, no. We won't even talk about that flying thing on Gran's head. I did like the husky spiders, though.
The Crood family themselves were completely different. They were drawn different, they sounded different, and they regressed further than they had in the first movie. Eep didn't sound the same at all. I know Emma Stone can do both her normal voice and the husky voice. The normal voice sounded weak but it actually matched her new bag of bones body type. Was Sandy in the movie? I couldn't tell. Thunk with the window teevee got lame after 3 minutes. The fact that they tried to stretch it out for the entire movie was weird. His innocence was adorable in the first movie; he became that slacker sitting on the couch eating up your food and drinking your kool-aid.
The fight scene with the punch monkeys was fun, but they could have left King Kong out of it. The end was not clear; did they find Tomorrow or are they still looking for it? Didn't Eep and Guy leave, or where they just visiting? I'm so confused!
Sigh...I'm pretty sure the next movie will be called "The Croods: Lost In Brooklyn" or something like that. Unless they get the original artists and go back to the drawing board, this will fail as well.