Interesting, MG.
I'd like to hear more about your view on the "cleansing" of the earth and liberation of people. Are there prominent writers/theologians who advocate this particlar view?
As for the question, "Who will they rule over"?
JWs believe that the intent of the whole end times business is to restore the things to the pre-Fall state.
In that state, Adam and his offspring were to rule the earth and every creature in it. There didn't seem to be an issue with humans being rulers back then, with no provision for a lower class of humans to rule over.