I really feel a strong desire for a slice of life oneshot featuring Sunset Shimmer.
I feel like there's so much potential for that character. I'd even be okay if she appeared in the main show.
She's like a Trixie but done better. But how overdone are the "lol sunset becomes good and goes back to Equestria" redemption fics? I don't know, but it sure won't hurt to have another one like that.