I am not sure about this but I believe there are
more clans to be introduced to us by kishi.
Currently, we don't know what clans shinobi
like minnato Namikaze, kakashi hataki, Jiraiya and
others are from. personally, i would want to be a
namikaze but the sarutobi clan is also cool though
with their ape summonings. Imagine summoning King
kong in battle. Now wouldn't that be so