I don't think it's canon, hell it can't even make up its mind on whether it wants to follow the anime canon or the manga canon it seems.

Been pretty fun so far. I see what you mean about the Outer Senshi not being so great at the start but with a few levels they become pretty awesome. They do have the advantage of their low cost starting moves are both powerful and hits all enemies on the field. Shame they are limited in their movesets though.

The OST largely seems to hail from the actual show which is pretty nice though I prefer the DiC soundtrack over the original (blasphemy I know) but I love how the game actually uses voices from the show and most of the special moves are accurate to the anime.