Jason Momoa has been cast as Conan the Barbarian in the upcoming film set to begin shooting in March, according to Nikke Finke of Deadline Hollywood. This production should pose no difficulties for Momoa’s role as Khal Drogo should HBO order a season of Game of Thrones, as the production is not likely to start up shooting earlier than April or May of this year, and scenes set in the Dothraki Sea may well be scheduled for later in the production.