Plot Bunny Sale!

Let's see if I can upload something without screwing it up.  Once again: feel free to use this as inspiration.

First idea: something I've never seen in a fic before.

Plans gone awry

Celestia was nervous.

Her, the sun princess, ruler of Equestria, nervous!  Her faithful student would be beside herself with disbelief.  What could worry her?

Indeed, why would she be worried?  The Summer Sun Celebration was only hours away.  The day that marked her victory over Nightmare Moon.  The day she had waited a thousand years for.  The day she had planned extensively for.  The day that would, hopefully, spell the end of her thousand years of grief.  Her thousand years of guilt.

Her thousand years of loneliness.

Celestia resisted the urge to vomit.  Nerves would not break her composure.  It had been hundreds of years since the last time she had succumb to nervousness and she didn't intend to break her streak.

What right did she have to complain about loneliness anyways?  None whatsoever.  Not when Luna had spent nine hundred years, eleven months, twenty-nine days, and- she checked the clock on the nearby wall- sixteen hours on the damn moon.  All alone.  No one at all.

Unless there were ponies on the moon.  Maybe  mean ponies.  Or monsters.  Hungry, viscous, monsters with claws and teeth and Faust knew what else.  Chasing, hounding her little sister for a millennium of terror and pain...

Celestia shook her head.  Those kind of thoughts served no purpose and soon it wouldn't matter anyway.  Twilight had been sent to Ponyville.  She would gather the Elements of Harmony.  They were drawn to one another.  They would gravitate towards Twilight as the Element of Magic.

Unless Twilight wasn't the Element of Magic.  Unless Celestia was wrong.  Unless there was some other unicorn out there, with magic as their talent, that had no idea what was going on and had no way to bring the other elements together and save the world.  Which would bring night eternal.  The end of all life.

Princess Celestia checked the seal on Nightmare Moon.  Failing right on  schedule, which meant that it didn't matter at this point.  Whatever was going to happen would happen.  A thousand years of preparation and planning came to fruition in a matter of hours.  She just had to remain calm.  She just had to trust in Twilight.

She had to get a move on, because she had spent several hours worrying.  It was time to depart for Ponyville.  She nodded to her escort as she climbed into her chariot.  Soon they were off.

Shortly...

Any moment now... there.  The seal was broken.  Nightmare Moon was free.  Celestia took a deep breath.  It was all out of her hooves now.  Nothing to do but wait for her wayward sister to show herself.  It wouldn't be long now.  Nightmare Moon would have to try and subdue her to wrest control of the moon back, Celestia had seen to that.

.....Nothing.  Was she disoriented after her release?  The geography had changed in the last thousand years.  ...But Celestia's power should be like a beacon to the other alicorn, she shouldn't have any problem finding her.  So where was she?

They were calling for her on stage to raise the sun.  Oh, dear Faust, was Luna going to attack the crowd?  Celestia walked forward and began the ceremony as she had so nine hundred ninety nine times before.  What if Nightmare Moon wasn't going to attack here?  What if she went after Canterlot while Celestia was away?  What if she went after Cadence in some jealousy driven rage?  What if Shining Armor couldn't rally the guard in time?  What if she possessed Spike?

What if, what if, what if?

The ceremony was over and the celebration was beginning in earnest.  Celestia's little ponies were cheering, laughing, and crowding around to get a look at their beloved leader.  Just like any normal day in Equestria.

Celestia wanted to scream.

Where was her little sister?