Haven’t heard much of anything about a release date. Or possible release date.
Do you mean the helmets?
The last update came out a month ago, and they usually don’t even mention the new update until about a month before it comes out. Plus, every recent update comes out 3 or so months after the previous one. I wouldn’t expect a release date for a while.
They haven’t said anything about the release date other then it will be in 2017. I’m guessing it will be more then a month from now though.
To keep things clean, there is an active thread here where this is being discussed. Feel free to read over my comments in there 
https://www.halowaypoint.com/en-us/forums/6e35355aecdf4fd0acdaee3cc4156fd4/topics/any-news-on-first-2017-update/37696728-0b3e-4575-b5c6-0a2de2b8d02f/posts