7 minutes ago, Jedi samurai said:
You're right, which is why I didn't stat it as a fact, but just something that wouldn't surprise me.
As pointed out above - the Spider and Mantis clans could potentially be left out of the starter because of their more recent addition to the game (at least as great clans), they don't have Kami attached to their clans (so if each clan has a Kami card of some kind, adding them later with different make up/mechanics makes sense), the number of cards needed to support two extra clans at launch MIGHT mean putting some off until later, and while there are other places they can go with the big expansions, what would sell more boxes up front when trying to hook people to the game - the Mantis or Spider Clan, or Rattlings and Ronin?
I don't really see how having kami attached is relevant at this point. Moreover, the Spider Clan does have one... sort of. Well, had one.
I don't think Ratlings are ever going to return to the game. They were a rather unpopular faction even when they did exist and they really detracted from the whole game theme. Having to have a certain amount of ratmen cards in every set meant less functionally playable cards for everyone else. At least when there was a Ronin or Imperial or Ninja strongholds, they were mostly making use of cards that were being printed as "general use" cards anyway. Something that was equally true of Shadowlands cards. There was supposed to always be some level of temptation for a player to play shadowlands cards to get an extra edge, but with the understanding that it left them vulnerable to certain play styles and meta.
But Ratlings? Naga? They just didn't fit in. I am pretty sure they are widely acknowledged as mis-steps. Not to say you can't have the occasional unaligned non-human personality pop up, but trying to pop up a single type as a fully integrated faction didn't work.