This was being discussed when pictures of series 7 were revealed. There was debate as to what the emblem on the Black Knight's shield was...
Well if anyone has the latest lego club magazine (mine arrived this morning) there's a pictures of all the figs doing various things, and the knight's shield is visible and... it's a boar! Should make for an interesting new faction.
In terms of other Castle parts, the viking lady has a good torso design, new helmet with hair mould, and flat silver gladius. The Red hood on the 'grandma visitor' (official name) is a welcome addition, as is her basket. The Aztec type warrior could make for some exciting army building, espically with a great helm, eagle shield and golden spear. And i'm sure people will find castle uses for the tarzan boy torso, bagpiper parts and new silver crown on the bride.
All in all so good parts for castle fans to look forward to soon (April 6th is official release I think).