Zell is working on a game called shiro no yakata at the moment, then I believe Succubus affection 2 is next, he also has his own horror game he was working on aside from shiro no yakata ... After all that he may come back to FOBS but I've heard some doubts on that... From what I gather the original engine he made FOBS on was very limiting which was why he broke it into 2 parts, so he started remaking it on a new engine, but it was very tedious and he lost interest as other projects took over... So as to whether he'll return to it is a big if really, I hope he does eventually though, as far as h game pixel art goes, I think he's the best there is.