An idea thrown around the ZIM crew offices that most likely would never have been made even if ZIM wasn't cancelled, Invader Dib was the title of a proposed TV movie set several seasons into the series. It would've involved Dib going to Irk and taking action against the Irken race, and it probably would've served as a finale conclusion to the series.

Apparently Jhonen Vasquez wanted the later seasons to diverge from the original format of the series and instead depict a galactic chase as Dib pursues ZIM across many alien planets on his way to Irk, finally ending in the TV movie Invader Dib.