This doesn't look very good, does it? So little elements of gameplay shown just a few months short of release, the animations don't flow really well, the cel-shading seems to be hiding poor graphics... Besides, the ratings of Bamtang Games (the devs) are mediocre at best. It could be a good surprise, but I wouldn't hold much hope.
It's a shame, because there's largely enough material in the Avatar universe to make for a great game: be it an Aang, Korra, or any other Avatar story not told in the shows or comics, or even the story of a new, unknown Avatar... Even any other bender during either Aang's or Korra's time could make for a great game. But that wouldn't be on the same scale and budget as this one, of course.