Atlantis: a mare's tale

An adaptation for the atlantis movie

I just had a lightbulb go off in my head when I thought of this. If someone could find a cover image, that'd be great. I write in anthro because I find it easier. I don't My little pony or Atlantis the lost empire.

Her grandparents were always adventurers and believed in the tale of Atlantis and so did Rainbow dash. They died believing that story, but what if it was true? Rainbow dash is going to find out.