I'm not sure if this has been mentioned before, but, Lego could do a few castle expansions both for lions castle and Dragons.
The Lion Castle has a quite small area inside it's walls so it would be nice to add some room to it. I's something like it was done in the early years (80's) with the liking of 6040 blacksmith shop, 6041 armor shop, 6061 siege tower, 6042 battering ram, and 6067 guarded inn, of course it wouldn't need to be the same items, for exemple the blacksmith shop and the armor shop could be something more civilian like a tailor shop or a candle maker, the guarded in could be a artist school or a school for the education of the royal family.
For the Dragons it could be a training ground, a small pig or chicken fram (they also have to eat) or simply a few walls in order to make a castle of it. In this case it would have to bring extra pieces so we could adapt the modular desing to the 7947 prison tower crescue.
This really sounds a great idea
The expansions would be a good extension to the 7946 King's Castle, and why not to release archers' training post (like or much better than the Ninjago 2516) with two archers minifigs and a mini wall. There's a lack of bows in these last sets, so maybe they make these sets with the bows included.
Btw, anybody knows if Falcon Knights oficially will be released as a faction in 2012?