The three new replacement Iroshizuku colors. The only one that looks like an ink I don't have is hotaru-bi. I want to see hana-ikada compared with kosumosu. From my memory, they seem pretty close. I have too many teal inks but I can't resist a good one. I hope they release the three in a small bottle set.
When they first announced it, I hoped for a red or purple (Bishamonten and Jurojin) like their 100th anniversary shades. I love those two but it pains me to see my bottles becoming empty...