If the staff support this, I'd possibly move onto doing more versions of the Throbe and make it reflect different cultures (Moroccan, Somalian, Arabian, Indonesian) along with Islamic headwear (Kufi, Keffiyeh, an more accurate Turban that is sometimes worn by Pakistanis, Fez)
I'd also look into designing Islamic women's clothing and the Burkini (the Islamic bikini.) and possibly Niqab or Burqa.