There’s no certainty when or if Terrarium TV will be back. The developers are no longer providing app support and are encouraging users to uninstall the app immediately. But the Terrarium TV app was shut down before, in September 2018, and was thereafter revived. This means there is always the chance the original platform makes a reappearance in the months or years to come. For now, the developers have gone quiet, and there is no promise or hint that Terrarium TV will be back.