I sort of suspected (hoped?) that the finale was a set-up for a movie. I'm happy it was announced if only because it'll keep fandom alive, though I also hope the promise of new canon doesn't dissuade people from ficcing the hell out of series 4. I'm not sure if I even care about the storyline (though I'm sort of stoked for possible gen 1 / gen 2 interaction), but I'm SUPER excited that we haven't had the last of the cast yet. Yay!