When does Spartacus: House of Ashur return?

Spartacus is an American historical drama television series that premiered on Starz on January 22, 2010, and concluded on April 12, 2013. The series was inspired by historical figure, Spartacus, a Thracian gladiator who led a major slave uprising against the Roman Republic. A sequel series called Spartacus: House of Ashur is in development at Starz, with Steven DeKnight returning to write for the show.