Mino Tarou announced on Twitter on October 1st that there is a new Papilon Rose domain. Here is the link:
There must still be hope for the new art book!
I have some sad news. Mino Tarou replied to someone on twitter that the Papillon Rose movie 1 was intended to be one project and he has no plans to continue it. https://mobile.twitter.com/mino_taro/status/746780033826492416