Little is known about how Khalid was chosen by Nabu to become Doctor Fate, all that is known is that friend and ally, Hawkgirl gained her powers/wings at the same time with him. Since then, Khalid has been very wary of the Helmet of Fate, often refusing to wear it due to the toll it takes on his sanity.
Khalid Ben-Hassin assumes the mantle of Doctor Fate in Earth 2 #9 (February 6, 2013).
Dr. Fate makes his Earth 2 debut! Supernatural powers are emerging on Earth 2, and that means new heroes on the scene–not to mention new villains!