If I had a contest?

I recently came up with an idea for a game and I had the idea of holding a contest to design some of the characters for it.

The game is based around the vodiac (the leo, virgo, aquarius one, not the chinese one) and the main character is Leo.
The other stars of the zodiac have been captured within crystals and are being used in horrid experiments by an organization who wants to overthrow the gods and rewrite the world with the power of bllod science. Leo must retrieve each crystal and awaken his fellow stars if he is to defeat this threat. But, he won't be alone in this quest. Each constellation, while not strong enough to form their physical personas, can lend Leo items of great power as well the ability to be a called upon in battle.

Now back to the contest, some of the design I'd be looking for is
(character:possible guidelines)
Aries: a male ram character
Taurus: a bovine character of either gender
Gemini: twins with inverted color schemes of any species
Cancer: anthrocrab/crab themed character
Virgo: a female character of any species
Libra: an older character of any species
Scorpio: anthro scorpion
Sagitarrius: bow and arrow wielding horse or centaur character of any species
Capricorn: a female goat character
Pisces:Mermaid/merman or other fish related anthro

Leo and Aquarius (my own birthsign) I will be designing myself

I won't decide on prizes till I figure out if there is any interest, but it will most likely be along the lines of few single character color pieces.

I would also accept just ideas in general, so FEEDBACK PLEASE *gives you all big kitty tigerwulf eyes*