Well, L5R had clan wars (for which, I am one of the lucky ones to still have the book and some minis for it);
I hope clan wars came with the L5R IP.
I would love to see it making a come back (specially now that the "one that shall not be named" is taking a nose dive).
Over 15 years ago, that wargame crashed and burned, but because they started way too ambitiously in a context where one miniature gaming company had the monopoly;
now, the community is a lot more diverse...I think that as a skirmish game that may evolve eventually to a large scale battle game, this game could make a come back (what's not to love about samurais, onis and dragons ?)
just my 2 cents.