Many fans are aware that at some point George Lucas mentioned good mothers and bad mothers being featured in the prequels. We assume he's not calling Darth Maul a "bad mother". :) Anyway, Kal was able to dig up that famous quote:

I was reading an old Lucas interview in "American Film" magazine from way back in 1983. It has some possible clues as to what to expect in the upcoming episodes. Lucas states:

"Fairy tales are about how people learn about good and evil, about how to conduct themselves in society. Darth Vader is the bad father; Ben Kenobi is the good father. The good and bad mothers are still to come."

Very interesting, and Lucas mentions this again later in the interview:

"There will be another trilogy, of course, which takes place before the current one. It deals with the young Darth Vader and the young Ben Kenobi, the good and bad mothers will play their part, as will the robots - R2D2 and C3PO - the only "actors" who will bridge the trilogies. At the end of the first trilogy, Luke Skywalker will be four years old." Obviously, Amidala will be the "good mother" that Lucas is referring to. Also, as seen in "The Art of Star Wars, Episode I," Darth Sidious' apprentice was originally a "Sith Witch," later replaced by the character of Darth Maul.

As we know, Lucas usually keeps his basic ideas intact, so is there a possible major bad-woman on the horizon in Star Wars?

Another question is has George Lucas changed his mind since that interview was conducted? Who knows.