Let me tell you one thing. Saudia is fair in the way it deals with many pilots from different nationalties. When, the time comes for upgrade and by the way, that wont happen before ten years, they will make an evaluation to you. If you have good knowledge and attitude, they will upgrade you. If not , they will keep you a FO on 747 as they did with so many who dont deserve to be commanders.
cheers
sami