What We Left Behind
A documentary made by Ira Steven Behr (the original producer of DS9), they had an IndieGoGo campaign that raised almost 150,000 dollars in ONE DAY. Looking back at DS9 and speaking to the cast about it, it also brings in the old writing staff to talk about what an eight season set twenty years later would be like.
REALLY looking forward to this:
https://www.indiegogo.com/projects/what-we-left-behind-star-trek-deep-space-nine-doc/#/