Talk:Episodes, films, and shorts/@comment-26208943-20150203235101/@comment-10390252-20150204114034

I'm hoping that we're going to get show canon as to what precisely made Luna turn into Nightmare Moon. Was it just her misplaced jealousy or was the Nightmare Rarity arc in the comics correct when it claimed the existence of a 'Nightmare Force'.

Possible plot device: Luna is helping Apple Bloom with her nightmares but something about the filly's sometimes-strained relationship with AJ strikes a chord. So, she ends up helping Luna confront her darker memories on the path to confronting her own nightmares.