Keep the good work! I feel I will probably even make Abdul Alhazred as Hero!
On pre-Islamic Arabs: they feeled very strongly about their tribes. Possibly we could make some tribe differences - along the lines of Amazons or Marverni. I just have no clear idea for now... e.g, make each tribe considered descendants of a particular genie... or something along these lines... Maybe use alternate mounts?
Another question - what other Heroes could we use? Nasreddin is from actual folklore & also close to more canonical Hydr. Old Man should be here without question (alterantely, he could be made a Rainbow-type Pretender but I'd prefer him as Hero). Alhazred I just love, though he probably shouldn't be present in every era...
What are other possibilities you would like?