An adaptation of the popular video game series HALO has been in the works for a long time. For those who are unfamiliar with HALO, it started out as a typical marines-vs-aliens stories with a twist that there was a deadlier group of aliens called The Flood that would turn both humans and aliens into horrific zombie creatures. You played as Master Chief, a marine out to save the galaxy. When we last reported on the Showtime series back in December, director Rupert Wyatt (Rise of the Planet of the Apes) had departed the show. Now it looks …