Sunset's clever plans have taken her years to enact, and she has seen them shatter in just days. Now, she is prepared for one last bluff, and in the end, she hopes to come out with the crown. Barring that, if her bluff is called, she'll at least have her dignity.
One little change, one outside factor she hadn't accounted for, leaves her with nothing but a mess. She was not prepared for this...
Rewatching Equestria Girls, I realized that there was a gaping plot hole wherein they could have ended the movie much sooner, totally wrecking Sunset's plans without wrecking the school, blowing a crater in the courtyard, or redeeming Sunset Shimmer. Set right at the end of Equestria Girls, and diverging wildly from there.
This might start an AU, I am thinking of calling it The Diademverse. Hence, it's listed as Incomplete until I decide just what should be done with angry bacon pony.
And thanks to all who pointed out the title typo. Great way to start, right? 
Let's see where this goes.
First, its 'divergence'.
Second, really?
*Deep sigh* Well, I honestly hoped for her to break that damn statue, but you managed to deny her in a worst way possible - by Mr. Useless (aka FanHate Magnet) himself. *Shrugs* Technically she still can try doing it from the other side as the unicorn (with chance of it working depending solely on the authors intent, like any other mostly undefined MLP issues), but unfortunately I do not think that it's something you plan to do here. And considering that, I do not see much reason to read it further if/when it's going to be updated. (Though I may check later for ideas)
GLHF!
You know, thinking back on that one scene, was Sunset planning on bluffing that she was going to destroy the side of the statue that had the portal in it? Because if she was, she clearly didn’t think that through fully.
Had she actually gone through with her bluff, then she would have been swinging at a still open portal. The only thing that would have happened would have been the sledgehammer going through the portal and probably taking her with it due to there being nothing to stop it. She would have just ended up going back to Equestria for a second time and, once Celestia saw unrepentant Sunset was, probably either be locked away or banished to Tartarus or something.
8657615
She not going to hit the mirror, she going to hit the mirror FRAME! thing about it, the mirror just a swing and a miss, but the frame holding said mirror and keeping portal in place, EASY TARGET
She not going to hit the mirror, she going to hit the mirror FRAME! thing about it, the mirror just a swing and a miss, but the frame holding said mirror and keeping portal in place, EASY TARGET. WHY DO PEOPLE ALWAYS FORGET THE MIRROR FRAME.
Impressive. I never would have thought of that. Also, it's spelled Divergence.
8660608
Even if she hit it with the sledghammer, the sledgehammer would shatter because if the gateway is strong enough to hold an interdimensional portal then you wouldn't be able to break it with a slegehammer heck, unless you dropped a meteor on it it won't break. Remember Midnight Sparkle blasted the top of the portal and did barely any damge to the stone underneath.
This is a question that just popped in my head, but why didn’t anyone intervene?
This man flash just grabbed the hammer and walked away like it was nothing.
I don’t see why.