CCQ/MFF
The real question is the cockpit layout of the 330NEO or 339 (whatever it ends up being called)
Will it be a current 330 design, or a 350 style?
Either way, CCQ is happening. If Airbus are smart, they'll make it as close as possible to the 350 cockpit, and you'll see either MFF or maybe even a common rating.
Don't dismiss the potential cost savings of commonality. You can be sure the bean counters have it on their spreadsheet.