Potentially, but we should remember that since the "Rightful Shah" is being put in place they have other options.It's becoming increasingly clear that Persia is screwed, does that mean states that have been recently subdued by Ibrahim or his father on the Northern and Eastern fringes will get ideas? Seems like a real good opportunity to break free.
1) Turning in favour of Iskandar in exchange for more autonomy
2) Iskandar might HAVE to retake that territory to keep himself on the throne. Being put in place by a Roman ally and then losing frontier regions (more than was taken by the Romans anyway) is NOT a good look for a new Shah.