I don't believe it's a legendary. The movie it appears in already features 6 legendary pokemon. To reveal a pokemon from a new generation, they never used a legendary in a movie. WPM over at pokebeach, the place where you shoulda have gone to get your info(they actually research their info rather than lift it off a Japanese site.), speculates that it may be a Mightyena evolution. Mightyena appears in the movie in some capacity, that we know. Mightyena is also a pokemon in dire need of a “pick-me up” as far as strength goes. I don't think it's related to Lucario. It may have a similar body type as Lucario, but it doesn't seem to exhibit any of the characteristics of Lucario or Riolu. It seems to have a ponytail. At first I thought the part tied off was a tail, but after looking at it, it couldn't possibly be attatched to the back of the pokemon. Maybe once we get a name to go with this pokemon, we'll have an easier time pin-pointing it.Expect to see a lot of info regarding the next gen to be coming by fast once it starts coming, because the games are slated to hit Japanese stores this year.