I always wondered if Sunset Shimmer, reformed and trying to be good, would go back to Equestria, given the opportunity, and try to make amends with her old mentor…and how that would play out. Maybe something like this?
This isn’t a spoiler for Rainbow Rocks in any way, just my silly little piece of headcanon.
She doesn’t see Luna’s spiral of despair until it’s too late and loses her for 1000 years.
She fails to help Sunset reign in her ambitious desires and loses her to a whole other world.
She must’ve been constantly terrified something was going to happen to Twilight.
That would be an excellent plot twist.
I think that would be something.