The sequel is literally "the exact same movie as the first one, but this time with water (and bonus animal cruelty)"

I actually enjoyed the first one, but the second movie added nothing of value and cheapened everything that happened in the first one (in that literally no one gives a shit about unobtanium anymore)

Edit: Curious as to what the downvoters are taking issue with about my comment. Nothing wrong with liking the movie, but you have to admit the plot was basically identical to the first one, just with new characters and a different setting