Gentle Giantesses

Ok I have a new idwea for a story. There's a group of gaintesses who are guardians of different planets. Each giantess has her own planet. I'm basing these on some stories I write and of comic characters. Each giantess has a unique power. But they're not all the same size. The smallest is 15 feet tall and the largest is over a mile. These were the characters I had in mind.

Kitty Pryde, Rogue, Jean Grey (From the X-Men)
Mary (From the Island)
Lorna (From the Growth Experiment)
Sue Richards aka the Invisible Woman (Fantastic Four)
Hellcat, Giant-Girl, Ultimate Spider-Woman, She-Hulk, Liz Allen (Marvel Comics)
Dawn Summers (Buffy the Vampire Slayer)
Lisa (Doctor Who GTS)

I might think up of a few others. But there will also be some evil giantesses who want to rule the universe. (Sounds lame for now but I can make it into a decent storyline)
Tell me what you think.

Also I'd like to say goodbye to Redshadow who is leaving writing.com soon. He's a good friend of mind