It was in the PantheonPlus interview with Joppa:
Joppa said: "Yup, definitely. Very support heavy. They would probably fit into the Control archetype in terms of the kind of crowd control capabilities they are going to have. And interestingly enough the Necromancer will as well."
Since then the control archetype seems to have been relabeled "Support" on class pages, but it has long been called the CC/Support role by us following the game.