Both Polar Lights and NECA have 1/12 scale (or thereabouts) Queens coming out. It'll be interesting to see how they compare with the Revoltech one. I have the Tsukuda/Halcyon one and the McFarlane one.
A decent 1/6 one is probably still a pipedream....
EDIT: the Polar Lights kit is actually 1/9!! That will make her 2' tall! Also, retail will supposedly be $59.99, I know!! She's due this Halloween according to Monsters in Motion.