I have to say.... I wouldnt go to see it. For starters, I dont like the anime (only the games). So Ive never gone to see the films (other than the 1st). And another reason is that...... I wouldnt be caught dead queuing up to see it.
If the majority of the people in my school saw me playing pokemon at the age of 15, I would have the sh*t beaten out of me..... so, going to see a movie about it would probably not be a wise idea. I might rent it out on DVD though after it came out (but id have to go in to blockbuster in disguise)