[johnhiler]

Same (the lead developer on bbPress) has left the parent company of bbPress.

More here:

I have indeed left Automattic. I decided it was time to move on and pursue some of my own ideas and other interests.

I won’t have much time to contribute to bbPress now and I can’t report who is going to be taking over from me or if anyone is even being sought for the role.

https://bbpress.org/forums/topic/thanks-for-everything-sam#post-58402

We’ve received no word as to who will replace him (or if anyone will replace him). I’m hoping that Automattic will clarify things on that front soon… it’s been a month or so since Sam announced his departure.

So to come back to your original question: nobody knows when or if the next version of bbPress will come out!