If and when they are released and you feel the urge to experiment on the bleeding edge of the new technology, I would recommend that you choose a model that is an expansion of an existing 3TB drive that is compatible. That will give you a better chance of success. But do keep in mind that with unsupported drives, tech support will not assist. Keep a good backup and it is never advised to use experimental drives or beta firmware on an NAS in operational use.
Remember - the NAS is not a backup plan.
Backup = Good, No Backup = Bad