Back on topic, I don't even know why people doubt an update will happen. It will 100% happen.
The risk is that it will be a small, rushed, unsatisfying ending.
I'm even a believer in a certain conspiracy theory about what happened to ICSTOR, but I'm still confident the people who took over would still release SOMETHING. It's way too much money to be gained even if they release some tiny little 2-3 hour update of copy pasted dialogue and rehashed scenes.
What frustrates me personally is constantly setting deadlines then passing them. Just don't give a deadline. Why give august, then 5-7 days when you miss both? They're free to work as they want, but expecting it and then not getting it can be infinitely frustrating. I'm going to go on a limb and say a lot of people in this thread made specific plans to play it multiple times and ended up with blue balls.