Actually, I think that Aquarion is a better choice for Celestia, Luna, and Twilight.
Solar Aquarion - The sun (Princess Celestia)
Aquarion Mars - The stars (Twilight Sparkle)
Aquarion Luna - The moon (Princess Luna)
Plus, Solar Aquarion's Mugen Punch involves it punching its opponent TO THE MOON.
If that doesn't sound like a move that would be fitting for Celestia, I don't know what would be.
*Meanwhile at Titan Tower*
Raven *unenthusiastic*: "Evil beware...we have waffles..."
Evil: OH SHIT!
If you're taking requests, could you do one of Rainbow Dash dressed as Banpresto's Fighter Roar from The Great Battle IV? :3
err... i mean HAYday...
For everlasting peace!
I'm not making any promises.