Remember kids, the "If i announce it now the responsibility will keep me motivated to finish it" technique has a incredible history of failure. Just... Announce it when its done. If you cant self-motivate to finish your art then you arent going to finish it with thousands of people hounding you. American h-devs tend to do this constantly. If there is one thing i have learned, its that estimating the amount of work it will take to finish a long term goal is a complete and utter waste of time, so why announce it?