The Mad Mane Six.

After years of fighting endless wars and then watching his home world distroyed, the immortal Hero of the Dark Gearhead seeks a new land to call home for his people. After finding a strange signal that leads to another realm, he decides to scout it out, only to find that a old set of foes have conquered the realm. With the help of the local species (a strange set of miniature horses that call themselves ponies), can he defeat his past, or be consumed by the Darkness that he has denied for so long? Note, this is a combination of a original idea with the world of My Little Pony as to test the validity of the original idea. Please be accepting, you could be losing a decent story otherwise.