One thing that is new is that one device is the main one (where the timer and the Gatekeeper is) and other devices can be used as "Extra Devices" for special messages from the Gatekeeper for a certain player.
Intriguing. Maybe the messages are the usual insults, rewards or penalties?
As for international releases, I'm pretty sure it'll release here in the UK, since all the others have, even Khufu (that only reached the UK, Australia and Spain).