Board Thread:General Discussion/@comment-100.1.71.7-20160415023228/@comment-6697950-20160415112643

Progressive is a reboot in the sense that it is returning to a finished story and filling in the gaps. It's not an alternate story, well, at least the author has claimed that he is trying for both the main series and Progressive to be in the same timeline. As such, the possibility of the fate of the Black Cats being changed is practically zero.

Whether or not Sachi will make a return depends on a few factors. For starters, whether the author is going to continue the story for that long. And even if it does make it that far, it's questionable how much content would anything related to the Black Cats have. Grinding and training doesn't really sound that interesting.