Easily one of the biggest let downs as far as sequels go. The whole movie feels like a trailer for an Avatar movie. The plot (SPOILERS) is watered down to good blue CGI kids go somewhere they shouldn't and get caught by bad blue CGI people for the blue CGI parents to come rescue them in a fight.
Amazing visuals, yes, but a movie cannot stand on visual candy alone.
Dialogue and script feels really safe and predictable, so by around halfway you already know how its going to end.
Waste of time, if I had pirated it I would have still felt scammed.