According to new source , BlackBerry Priv will receive Android Marshmallow Beta update on next week. The news is from the tweet by Michael Clewley, director of Handheld Software Product Management at BlackBerry.
— Michael Clewley (he/him) (@MichaelClewley) April 1, 2016
According to him the update will be available within next 2 weeks. So lets wait for the update on Blackberry Priv.