I'm not sure, they've already shown the first and second Inuyasha movies, so I'm guessing if they do it again, it'll be the third. I'm pretty sure they're doing this to get ready for all this new stuff. New S-cry-ed, new Samurai Champloo, maybe new FMA, New Inu of course, probably replacing PA or something else with that new show that's coming out this Saturday. I'm actually really excited!!! I can't wait! And that new show looks really interesting to me! Plus the music for the commercial advertising me is awesome and gets me excited! 😛 I can't wait!!!
no, the creators just decide to make a movie. it's basically the seires, just all summed up in like a hour show. there are some differences between the two [ex: in the series there's a princess that you just feel like killing b/c she is so prissy, but in the movie she's a princess, but a warrior]. also, in the series there's kind of a relationship between the 2 main characters, but it's always like [i like you, but i don't know *type thing*] and in the movie you can basically see the relationship, throughout the show.