The comments from Richard Garfield and second hand reports of FFG staff indicate some vauge ideas of how the game will grow and expand.
Thats understandable! Such a new product means any plans put down now may not match reality down the road.
currently it looks like Richard wants both new houses and original houses in the future products. What that means exactly is a bit tricky, would the original houses have new cards?
While mixing sets should happen I feel like doing it too soon would feel bad if I pulled old cards mixed with brand new cards.
Also a mix of new and old cards Would be a very different value proposition to the purchaser then the first set with 7 original houses.
I think mixing sets should happen in some sort of special mega anthology set release that comes out every few sets and like a magic core set reprints a bunch of out of print cards in new combinations.
Personally I want to see some sets that like magic’s “blocks” have very strong themes that tie the factions together.
The first set establishes a nice fun anything goes feel. This leaves it open to explore neat themed sets down the road.
I would love to see L5R clans get a keyforge set all to themselves.