It looks like Carnival is on the verge of ordering a new prototype ship for Princess. The article is mostly about the new ship for Carnival Cruises; but go to the very last paragraph: it says the order will most likely be placed by the end of this year for delivery in 2013. I'm hoping for something around Grand Class size or smaller; but I know that's not realistic. Just so they don't try to outdo Oasis and Alure.
See the article here