TL;DR – A blast from the past that does the twin jobs of bringing closure to the past but also propelling the series forward.
Score – 4 out of 5 stars
Post-Credit Scene – There is no post-credit scene

Review –
Back in the day, there was an irreverent, abstract, absurd series about an alien
trying to conquer the world. Who spends more time yelling at the camera that accomplishing
anything. This was a show that created a world that was based around a power hierarchy
of who is the tallest among them and it just works. It was a series that was a half-ridiculous
and half-scathing commentary on the modern world. However, it was a show that
kind of just ended rather than going out on a strong note. Well, it seems this
is the year of the rebooting old cartoon shows, and I could not be happier.
So to set the scene, it has been ages since the alien Zim (Richard Steven
Horvitz) and his companion Gir (Rikki Simons) have been spotted on Earth. While
he has been hiding, his nemesis Dib (Andy Berman) has been focused on nothing
else, including staying on a chair watching cameras forgoing all things like
bathing. But when Dib was at his lowest, Zim returns because Phase 1 is complete
and Phase 2 ready to start … if Zim could just remember what Phase 2 actually
was.