The release candidate for WordPress 4.7 is now available.
WordPress will ship 4.7 on Tuesday, December 6, to test WordPress 4.7 before that, you can use the WordPress Beta Tester plugin or you can download the release candidate here (zip).
WordPress 4.7 is a jam-packed release, with a number of features focused on getting a theme set up for the first time. Highlights include a new default theme, video headers, custom CSS, customizer edit shortcuts, PDF thumbnail previews, user admin languages, REST API content endpoints, post type templates, and more.
Source from WordPress news