Maybe they're keeping them secret.
That's right- it's a huge conspiracy, a well-developed ploy to have them unannounced and hidden, and then when you least expect it, they're going to be unveiled. Smiles will appear from many, the sets will be declared the greatest ever, and a return-return to the golden ages of Classic Castle. Fans will be brought out of their dark ages, and people will build five times as many mocs as usual, claiming and announcing their undying love for all things Lego.
And while all this is happening, two TLG employees are going to look at each other, smile, and then laugh cunningly, remembering this thread, and the idea that one person somehow doubted them, and the omission of Castle in the leaked images.
"We showed them! That'll teach them to gauge our entire 2009 product output based on some Eurobricks scans! Mwaha ha ha!"