I've been Googling, but not finding anything on it. Any help would be appreciated.
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See the bottom part of this blog post: Latest Microsoft Office Developer Tools for Visual Studio 2015. It says the tools are for Beta 2 but they do work with the RC or RTM version. These are the latest tools as far as I know.
I cover this and more in What's New for Developers in SharePoint 2016.
Edit: From the article and video:
I tried all the above did'nt work - This article helped me http://asish.com.au/sharepoint-2016-project-templates-missing-visual-studio-2015/