Is Invader Zim Coming Back? Kris, April 25, 2010December 20, 2011 Almost a decade ago, Invader Zim, a highly praised Nickelodeon cartoon show created by Johnen Vasquez, was canceled for various reasons. Despite this, the fan base has remained strong all these years; so strong that Viacom-released DVDs with unaired episodes have come out with above average sales. Recently, however, there has been large…