With the Release of Darker Paths 1 and all three Adventures Dark and Deep books available for playtesting, I can't help but be excited to see what else Joseph will make.
The second most anticipated book, for me, for any RPG is Joseph's Adventures Great and Glorious.,The first being Adventurer Conquer King by Autarch. Mostly for the different tiers/types of play. Colonies, domains, war, generations. I think it will likely be compatible in some degree with ADD as well.
Keep an eye on BRW Games this month though, there could be another product release before you know it.