Shin High school dxd

Any updates regarding the release of volume 5? Seriously man it's been more than 4 years since the last release. I understand that he has some medical issues but every single time he releases something, he would be mentioning something about true high school dxd volume 5. About the manu script that is in preparation.

Can we expect an release this year? Did he mention anything regarding this in the afterword of junior high school dxd volume 2?