In January 2015, BoomGen announced that ABC picked up its biblical epic, Of Kings and Prophets, a dramatic retelling of the central story in the Hebrew Bible: the story of King David from shepherd to king. The series followed an ensemble of characters including Saul and David, the successive Kings of Israel, their families, and their political rivals. Of Kings and Prophets was set in the Kingdom of Israel, but filmed in Cape Town, South Africa. Aslan, Tousi and Jason Reed served as executive producers on the show.
In 2015, Aslan joined popular HBO series The Leftovers as a consulting producer for both its second and third seasons. In addition to helping to craft the foundation of the show, Aslan was integral in protagonist Kevin Garvey's season two character arc.
In 2015, Aslan began productionon the "spiritual travel series" Believer, a documentary series that follows Aslan as he immerses himself and experiences various religious traditions internationally, focusing on sects considered fringe and disreputable by larger religions. The program, which Aslan compared to Anthony Bourdain: Parts Unknown was part of CNN's original programming lineup and premiered in March 2017.
Aslan is a sitting member of the advisory board for the National Iranian American Council. In 2015 as a member of the group, he joined with 73 other "prominent International Relations and Middle East scholars" in signing a statement of support for the Joint Comprehensive Plan of Action, an international agreement regarding the Iranian nuclear program.