I think LEGO should consider bringing the Forestmen theme back (and castle in general, for that matter). Look at this creation by Sylon_tw. It features the classic light grey, black, and blue colour scheme but it is brought up to date. The blue is combined with dark blue to make it look less primary colorish and lend a mottled look. The grey walls feature texture to achieve an overall worn-down look. And the black is just a little bit less dominant than it was in the original theme. There is lush foliage everywhere and cute little forest critters hiding in it. Best thing about this whole castle creation? It is not conflict driven. At least if you presume the archer is just practising for athletic reasons.