Asked by your friend and ours Ryan Seacrest if Demi was returning (as quoted here), Cowell said: "That would be a good guess."
Hurrah! Ten points to Seacrest.
"Nothing is official, but I liked having Demi on the show," he continued. "She's fun to work with. I think we'd be crazy not to have her back."
It helps also that her new single is currently the fourth most downloaded song in America too, we'd imagine.
Asked when the world will get to hear the rest of the judging panel lineup, Cowell said, "within a couple weeks".
Hold onto your hats etc.