Sci-FI Fantasy RPG idea

Is this Sci-Fi game idea good or not

The game setting is in the Futuristic world, lived by Human and 2 different alien races. There was legend about great Divine Being who brought control and order to the land. Through the ages, people have forgotten about the great Divine. This angered them and caused destruction by causing each race to seek war against one another. Even though, each race is always fighting amongst one another, they seek the powers of the divine to be the supreme ruler.

Basic Break down of the game

• 2.5 or 3D
• Class (Each class also have sub-classes that you can intermix with each other)
  • Mage:
  • Cleric:
  • Warrior:
  • Assassin:
• PVP
  • Pay Back System
  • Race vs Race vs Race
  • Open PvP
  • Air Combat PVP
• Pet
  • Each player is allowed to have 1 Pet
  • Pet have 3 stage of evolution
  • Pet have their set of skills, kind of like a 2^nd Character
  • Pets can be traded
• PVE Events
  • Item Raids
  • Town monster Raids only for max leveled players are only allowed
  • Empire Control
  • 8v8 Coliseum battles
  • PK System (PK is like the best)