So, this one, made me do a rethink. It was actually pretty sad, there were jokes which fell flat in their faces. Characters which didn't really endear themselves - forget endear, they were actually forgettable. And the spoofs , weren't really that spoofy. I mean hey, spoofing 101 - just taking a reference to something, does not, a spoof make. You need to take the concept a step further and show something contrarian, and hence funny.
All in all, a bit of a disappointment. And perhaps a wake up call - not all animation movies are unconditionally good!