New Empires & Tribes?

I was thinking about adding some Tribes and a couple of Empires. I was thinking a Galactic/Space Empire. For this I was thinking about adding SpaceWings,MoonWings,SunWings,PlanetWings,CometWings,AsteroidWings, & DwarfPlanetWings. I was also thinking about having half of the NightWings move to here. The Empire would be located in Space. Also I was thinking about adding an Earth Empire. To go with it I think I would start adding some tribes namely MountainWings, HillWings,GemWings,DirtWings,SandWings,BrickWings, & MetalWings. They would live in the Wilds of Dethy. Should I add this? Please reply with your opinion.