Would love to see this mode return but here's why I don't think it will happen: (correct me if I'm wrong)
Infinity is built around Crimson and Majestic which are Red and Blue. As far as I've seen from spartan ops these are the only two teams. So to add an orange and green team they would have to say that unsc infinity has introduced two more squads for some reason.
Unless of course they just ignored it story wise and added two more teams for war games. --- Time is an illusion. Lunchtime doubly so.