Wrote a bit about the new map here (Patreon)

Development Update - Map09 & Release Coming in Sight news - Hedon mod for Doom II

With 0.9.a out, Hedon's one level away from a first full release. Yes, Hedon's just one big step away from a first full release. There is still a fair bunch of content to be added, but it won't take more than few months for us to see the fully fleshed version of Chapter I.