World Builds Itself

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

If it looks like there are more plot elements that are being added to the story that have never been there before or even mentioned, that's because The Word Builds Itself. This is when large, major parts of the planet seemingly come into being out of nowhere for the convenience of the story being able to continue.

This UnTrash is commonly due to bad writing not planning the future of its franchise out 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 or even a bad in-universe reason to why they suddenly showed up despite not being at least alluded to in the past.