Had the series not been cancelled, there would have been a season finale in which Operation Impending Doom II was put on temporary hold due to Invader Tenn being captured on Meekrob (thanks to the insane SIR units sent to her in Megadoomer by a rebellious slave). All the other Invaders, excluding Zim (though Skoodge fields Zim the information on Tenn's capture), would have been ordered to attempt a rescue by the Almighty Tallest. It can be assumed that afterwards, the Invaders would have gone back to their assigned planets to continue the operation, or the operation would have been permanently called off after Zim discovers the beauty in life on a certain planet.