Lets see, we have a pokemon being the bad guy (Unless they go and add some villain in the end, but I'm hoping that isn't the case).
Actual danger for the characters instead of the recent trend of minor danger (be recent I mean since the...4th movie I believe).
Idk, I may have to sit down and watch this one. I've actually been happy with this season so far. I stopped watching around the Hoenn season, but from what I've seen, they decided to change things up recently so idk, like I said I'll probably give this a shot.
The last few movies have been kind of boring, though this one looks a bit more interesting. For one, there are no useless movie-exclusive human characters or lame human antagonists around (yet), so that's a plus. And the movie's running time will probably be about 20 minutes or so shorter than usual thanks to the return of Pikachu Shorts, so that'll hopefully stop things from dragging on.
I'm more excited for the Pikachu short, though. It's nice that they're celebrating the 15th anniversary in some form, and it's going to be cute seeing all of the 'mascot' pokemon together, past and present. Wobbuffet and Corphish!
That aside, after watching all the Pokemon movies (Even Mewtwo Returns, and the crappy Pokemon mirage movie TV event thing) This one seems to have a lot of promise. Lets just hopes its closer to Spell of the Unown, and Lucario and the Mystery of Mew in quality, and less say...Giratina and the Sky Warrior. (Arceus and the Jewel of Life was pretty awesome too)