It's official now:
I'm so happy ;__;Four key original voice cast members Richard Horvitz (Zim), Rikki Simons (GIR), Andy Berman (Dib), and Melissa Fahn (Gaz) will return for the 90-minute movie, which picks up on a perpetually desperate and delusional Zim hatching a new plan to achieve his goal.
Zims return is significant for a couple reasons, one of which being its healthy second life in the zeitgeist as something of an animated cult classic despite just two seasons of story (which, really, is the crux of the whole cult classic part). Moreover, Zim joins Hey Arnold and Rockos Modern Life as the third title in Nickelodeons animated vault to be re-booted for TV: Hey Arnold!: The Jungle Movie will air this year, and a Rockos Modern Life TV special is also currently in production.