I wonder what the Runeverse version of Nightmare Night would be like?

Without spoiling too much about Runic Notation, there was probably never a Nightmare Moon in this universe, so there'd need to be another reason for them to come up with a holiday that happens to be exactly like Halloween.

An idea just popped into my head that it could have something to do with changelings, with the costumes being a metaphor for disguises (tricks), and giving out sweets being a metaphor for stealing love (treats).

Also, is there enough interest in the Runeverse to warrant making a group for it?