I'd love to see Khal Drogo and some of his warriors done. Buildable huts and such.
What about a "Cleghane Bowl" set, that has Sandor and The Houd on a curved staircase. That could be a fun build/display piece
maybe a house of Black and White, that has Arya and Jaqen H'ghar in the face room, could come with extra heads to use as disguises, and some that are just build in.
I'd say house packs, or house VS house, might be my favorite way to go about it.
For Starks, we have figures for Sansa, Jon, Ghost, Ned (I think) and Arya thusfar. Lannisters we have Cersei, Jaime, and Tyrion. Targaryans we have Danyeris and Grey Worm. So there's stuff to play around with with those just for existing figures, before even making new ones.
I think it would be really cool to see figure packs. You don’t have to be a GOT fan to enjoy them, they’re perfect for medieval style customs. If they went down a more obscure or original route for medieval stuff it would be cool.