If you have been keeping track of Google's work on the next major Android update, then you have surely noticed that the search giant is definitely pushing thing along a lot faster this time around. Instead of waiting for Google I/O 2016, the first developer preview builds of the OS came out on March 9, two moths or so earlier than expected. It was only after a quite popular crows-sourced naming campaign that Android 7.0 received its official Nougat desert title and that was held off quite a bit until July 1. So it would appear Google is definitely on a new schedule this time around...
Source: http://www.gsmarena.com/android_70_nougat_could_be_release_as_soon_as_next_month-news-19699.php