World Builds Itself

''That wasn't there before. Neither was that. Or that. Or that. Or... (sigh)''

When it seems there are more plot elements being added to the franchise that have never existed or been mentioned previously. This UnTrash is played when large, major parts of terrain seemingly come into being out of nowhere to allow the franchise to continue or not go stale. World Builds Itself can be due to the creators not planning the future of their franchise well or at all. It isn't limited to just areas of the world appearing out of nothingness. It also includes people and objects that are included to the plot with little to no explanation of how they got here. If the audience is unlucky enough, the creators will offer a bad in-universe reason to why those new things suddenly showed up despite not being at least alluded to in the past.