kakao's one of a number of artists I have my eye on since I did my recent recommendation because I like their work but they didn't have an easy-to-recommend book compared with what chapters were already on Fakku.
I can say that all but one of kakao's work currently available on Fakku was written after their last book was published, so with eight chapters at the moment I imagine a new book from WANI could hit by the end of the year. Chances are good that most, if not all, of the included chapters would be translated upon its publication, which would make it an appealing title to bring over.
That said, given how long Fakku's been translating WANI's biggest magazines, that's seemingly becoming the norm for any of WANI's relatively popular artists to have most of their work translated when a new tankobon's announced. I imagine that only makes it harder to narrow down whose work to bring over.