As long as your bootloader version is MM you can boot both MM and Nougat without any problem but if you have already updated your phone to nougat via ota or other official means then it's not possible to boot MM but only nougat.
Sent from my Pixel using XDA-Developers Legacy app
Hi I update to nougat via adb sildeload.zip then it is impossible to flase this MM stock rom? did you try it? thank you very much
regards