The product group just announced the public Beta 2 of SharePoint 2016 and Project Server 2016.
See all the details in the following official blog post:
Technet Resources on SharePoint 2016 Beta 2 can be found here:
Is the SP2016 MSDN Forum (https://social.technet.microsoft.com/Forums/office/en-US/home?forum=SP2016) still relevant for this release or will there be a seperate one?
Also looking forward to finally getting the new on-prem BI. I hope it won’t be just a connection to the cloud Power BI.
I did not hear about a different forum. I would guess that the same forum will be used going forward.