When they changed their FB cover photo today, it had a link to https://www.chaosium.com/blog/call-of-cthulhu-7th-edition-masks-of-nyarlathotep-to-feature-an-allnew-chapter-peru "A truly reanimated classic campaign, coming to you later this year!"
And as they said on FB: " All TBA at this stage, sorry. (but) Having said that, It should be out in PDF by the end of the year, physical copies several months after that."
It doesn't really matter though. I just wrote Masks 2017 as an indicator that it's a new version. Could have written "new Masks" just the same
Exact release dates aren't that important for me. I'm mostly just curious about what is coming up.