I saw it, it was shit, specially because I remember the first. The plot of the 2 is horrible, even comparing with first that was generic.
The story moves around the fact that humans want to get rid of blue ppl from a place to explore mineral resources, the leadr of the blues go away, instead of massacre the blue ppl they go for the leader in another place (???)
And half of the movie is just kids doing shit to help the plot show the water, this movie was a long and slow torture.