Not On My Watch...

What if? What if Twilight had a plan for the day Celestia passed on Equestria to her? What if she put that plan in motion at The Beginning of the End?

S9, Ep1. "The Beginning of the End" Part 1...
Except...it wasn't...
What if it happened differently?
What if a certain purple Alicorn had a plan?
What if she put that plan in motion?

This...is that story...