Ideas for new story

Hello everyone and I do hope you enjoy my ideas down below this sentence.

My ideas for My new Story is a different universe of the main six, using completely different creatures for story line.
Perytons shall be the pegasi or earth ponies (though they have antlers and wings so maybe either alicorn or pegasi.)
Changelings should be the unicorns. They do wield magic as well so it does fit for them. Or possibly a magic using creature adapted to a horse like appearance.
As for the earth ponies I was thinking an extinct species of horse called a Hyracotherium. or maybe an Arion.
As for the Alicorns I was first thinking of Djinns. They powerful creatures that wield magic and are a force to be reckoned with. Just like from Wish Master.

Any thoughts you all would like to address, please proceed in doing so.

**Notes**
UNICORN CHANGES

The Replacement for Rarity luscious pink curls and bright green eyes. Name: Akila which means most beautiful.
The Replacement for Twilight Sparkle:white hair to her shoulders, very smooth and combed straight accented with Pink eyes. Name: Dawn Star.

PEGASUS CHANGES
The Replacement for Rainbow Dash: Spunky black hair with streak of white and yellow eyes. Name: Swift Charge.
The Replacement for Fluttershy: To the ground golden and silver with purple eyes. Name: Nimble Hope.

EARTH PONY CHANGES
The Replacement for AppleJack: Double braided light green hair with blue eyes. Name: AmbrosiaBerry
The Replacement for Pinkie Pie: Wacky 70s rainbow hair with neon orange eyes. Name: Sunshine

These are just notes of course and are only in my head for now.