Yea i dont think it will come out as planned either. With the popularity of UO dropping fast, resources being diverted to bigger mmorpgs, staff leaving and condensing, we have enough trouble having KR worked on, much less the new expansion.
Just think how long ago KR was being toted, and now much work they do on it now. Not much. It doesn't take this long to do an expansion, except when you have very limited staff/resources working on it. Which we do.
I doubt very much they will even get KR properly fixed and working much less SA. I have a feeling SA has already been nixed, and we will start seeing parts of the ideas that would have went into it slowly getting into the game.
For instance. increased storag and 7th character. These were probably going to be in SA, but because of nixxing they decided to sell these on UO instead just to generate some income. Probably the same with other stuff.