Press report says Abu Dhabi.
No comment about KSA, but if I had to bet id say they will get overfly permission. With Bibi already talking about 'working' on it last week, I can already picture the PR he will do next week
And since it's AUH rather than DXB I would say it belongs in the Etihad thread rather than the Emirates thread.
I'm also guessing that KSA overfly will be granted, and as I said, that might be the main purpose of the flight.