Should cases where the Evil isn't really "sealed" — i.e. deliberately locked away, as per the trope's description — but merely trapped be split off? Because an awful lot of the examples seem to be cases where the threat got blocked by natural forces, not something an opposing force did to stop it (e.g. the alien from The Thing got frozen because it crash-landed in Antarctica, not because Precursors hit it with a freeze ray).

Should Pandoras Box perhaps be a redirect?

Quote from the Necronomicon