My West Marches game is going well. I plan to continue it. And I've hinted a few times before about an "East Marches" game. I'm going to try and get this out sometime next year.
I've got the map. I've got an outline structure for writing up the campaign in a way that should be intelligible to anyone other than me (my West Marches notes are pretty sparse, because I only need enough written down to jog my memory of what the encounter, mysterious location, or lair is supposed to be about).
Of course, the map has 748 hexes (with six basic terrain types), and I've got 120 "locations" (in five types) marked on it. And there are eight zones of progressing difficulty.
So to make this happen, I need to have four to six wandering monster tables for each difficulty zone (one for each terrain type in that zone). I need to detail 120 locations that can be discovered/visited. I need to come up with hooks and rumors that will drive exploration. I need more monsters.
I plan to make this fairly generic "old school" but primarily for Chanbara. So I'll use Chanbara monsters, and Flying Swordsmen monsters (that aren't already in Chanbara), and probably 1E OA monsters that aren't in either of those games. And some monsters from BX/BECMI (lots of normal and giant animals, giant insects, and general monsters that might as well be in an Asian fantasy setting as a European one). I'll probably need to include full stats for the monsters for DM convenience.
Oh yeah, and I'll need to write up the "home base" including several Lieges for Chanbara (or just as patron NPCs for other system games).
So this will be a pretty big book, actually. I figure the difficulty zones should allow for some overlap, and take characters up to at least "name level" if not higher.