Ivinia and Shorkyne
If I had the choice I would like to get a reissue of "Ivinia" because it is very hard to get and some more modules about its kingdoms. I own a copy of Menglana that I bought on SPIEL in Essen (germany) this year and I REALLY like it. I think the isle of Hârn is MORE than well developed.
There is so many other stuff that was already published over the years (e.g. Shorkyne, which is also very interessting). But all that modules are "only basic skeletons" for further developement. In my eyes this is a mistake. This mistake was avoided with Chelemby which has the add-ons Koladis and Evanekin (and Chelemby City). This is a good point for me as a GM to start from when I create my adventures. Chelemby also has a very good focus on CULTURE that explains customs of the people. (Yes, this is a gread laud ;) ). For me Chelemby was one of the best publications in the last years. I decided to start my next campaign in Chelemby BECAUSE "developement conditions" for my own adventures are good enough.
Back to Ivinia. Menglana is also a good module but it gives not as good informations as Chelemby and with Shorkyne Region module I only have a basic frame. (Ok, Chelemby is a part of Shorkyne-region, I know, but thats the point!)
I don't know if I'm right but I think the HM community is very active and makes very good Fanon. Perhaps, IF the "white places" in some alreasy published material would be clarified more GM would like to create more fanon for these regions. That's what I'm asking for.