Maybe. I'm not an expert on Opera (and haven't heard much of it either) so you might be right. But I remember that there was an attempt (I think in the 40s or the 50s) to make an Arabic Opera, and it failed big time. The singer who was supposed to sing it, was at that time (and still is) the best most famous Arabic singer. Her vocal abilities were compared to an Opera singer called Maria Callas (Whom I'm told was a great Opera singer herself).
If you're interested in listening to Oum Kolthoum (the singer I was just talking about), here's the best YouTube video I could find:
http://www.youtube.com/watch?v=VQ8Cu...eature=related
Maybe you can judge from this. But I'm still not sure about Arabic being an Opera language. Maybe if I hear it and judge myself. Who knows.