Here's a (hopefully) interesting thought.
Thinking about it Twilight turning into an Alicorn was never a question of IF but rather WHEN.
The odd thing is that the answer in and out of universe seemed to have been "Too Soon".
Her name was written in stars, clearly. But she wasn't ready. No amount of fate, prophecy and destiny can get an anxious misanthrope virgin to successfully fill the gap of immortal national governance.

















