Even films leaning on mythology and fantasy have to have some sort of internal structure and coherence. This one fails on both counts. In fact, it's as if it doesn't really care that the fantasy elements are internally consistent and events make some sort of (even fantastical) sense, as long as the visuals are pretty and the emotional element overwhelming. It scores high on these two counts, for sure. Everything else is more or less left unexplained, hovering on thin air, so to speak (the princess's travels and actions, why the three guardians failed to appear, etc.). Emotions are lofty indeed, as befits mythological narratives that paint extreme situations in broad strokes, rather than insinuating the complexity and nuance of real-life situations. On their own, though, they are not sufficient to lend sense to a world of mythology. Non-western systems of belief have their own internal logic and actions are explained by it, if differently to actions in a western context. The movie fails on this score, and soppy acting by the main characters is no substitute. What all this gives us is lots of disjoint scenes of spectacular action and intense sentiment, underlined by very good CGI and visual work. It does not give us a full-scale movie.