Ok thx for the PTR guys.
Phil this is my feedback you can check whole progression on twitch channel name: czmax667
I did hard campaign - with speed transition to insane - then nightmare and then i skipped the grind towards Massacre that was the end of stream.
here are the points:
1 After reach 60 NM is not unlocked - and it does not say why - i suppose its because you nood to complete summit insane (YES you still have to do Summit)
The message in map selection for NM and Massacre - should be "Nightmare / Massacre difficulty unlocks after beating the summit on Insa