Yes I did consider using Trixie for this. I actually did want to use her, but then I remembered, she's evil xP And there's not enough scenes that fit her with the trailer. :( Sorry guise.

Twilight Sparkle, a magician from Kansas, gets sucked into the world of Equestria and is forced to defeat the wicked witch.

Twilight Sparkle - Twi
Princess Luna - Theodora
Princess Cadence - Evanora
Princess Celestia - Glinda

Burning down scene taken from SherclopPones' Witchcraft is Magic series:
https://www.youtube.com/watch?v=KafNXjIh4MU