It is a known matter that Google will release the Android Nougat final build in this month itself. As there were some rumors at the start of the month saying that August's security patch will be the final build of Android N, however, that wasn't the case.
And, now the update schedule history of LG and Telus (Canadian carrier) shows that Android N might release on August 22. Both LG and Telus have some history of delivering the updates in time.
In the update cycle of Telus, it is clearly mentioned that the devices such as Nexus 6P, Nexus 5X will be receiving the Android N update whereas the Galaxy A5 will be receiving the Android Marshmallow code.
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And, the Korean page of LG G5 shows the same date to experience the next iteration of Android, which further confirms the release date of Android N. Having said that, Sony has already released the AOSP code of Android N.
That said, we can say that the Android N will start rolling out from August 22 (Monday). As of now, there is no information regarding which devices will be updated to Android N apart from Nexus 6P and Nexus 5X.
Stay tuned for more updates regarding Android N.