It was said in his Q&A and his face revealing videos that he has new characters coming into the story of the Elements of Insanity. I wonder what ponies they are going to be before they are freakafied?

It's the Dazzlings.

4651905 How so?

4655539
If you look closely silhouettes that appears when Shadow was talking about future chapters. The silhouette resembles Dazzlings in pony form.

4655902 huh, never guessed.