Since her interview, Fisher's rep has come out and said his client was joking.
But wait! After the official backpedaling Lucas told Business Week:
We had already signed Mark and Carrie and Harrison—or we were pretty much in final stages of negotiation. So I called them to say, 'Look, this is what's going on.' Maybe I'm not supposed to say that. I think they want to announce that with some big whoop-de-do, but we were negotiating with them. I won't say whether the negotiations were successful or not."
Dammit Hollywood, quick playing games with our hearts.