Back in February, we finally got our first look at the next Pokémon movie. At that time, Mewtwo Strikes Back Evolution was revealed as a CG remake of the very first Pokémon film. There's been virtually no news since then (although, seeing as it's a remake, there can't be that much to reveal outside of new footage), but that will be changing soon.
The ever-reliable Pokémon news site Serebii is reporting that the next update on the movie is coming later this week. During Thursday's episode of Oha Suta, a Japanese variety show, there will be "brand new world exclusive information" revealed. So far, all that we know is there will be info on guest voice actors, but hopefully there's a lot more than that.