My take on NightMare Moon

I don't have much to say but this : her design works better when you don't try to give her too much facial expressions , so I just focused on her hostility . I think that being locked for a thousand years did not do much to calm her down , so this is the most logical reaction she'd have against her elder sister once she remembers being locked away for a friggin millenia.
By the way , what if this appearance was the real deal and the Luna one an enchanted form to keep her in check ? food for thought eh ?