Microsoft's Gabe Aul just dropped the news that the next build of the Windows 10 Preview for Windows Phone is due this Friday at 10 am PT (1 pm ET).
The news was announced on the Windows Weekly podcast, which is currently being broadcast on TWiT.
That is the good news. The bad news is both the Lumia Icon and Lumia 930 will not be a part of this update round due to a bug with device scaling. Of course, this will be addressed likely for the next-next build, but not for this one.
Microsoft posted a few weeks ago the list of Lumias that will be included with the next build of Windows 10 Preview and the rest of that list is still intact for Friday. You can see that list here of eligible Lumias.
Microsoft will post a blog post later this week detailing all the changes with this build, which include some changes requested by users.
Source: Windows Weekly