Are we adding a new class for Helm's Deep? No.
Then there's the reality of the larger impossible to answer questions which we usually ignore. Questions with "ever" or "never" in them.
Are we EVER going to add a new class? Great question. Maybe. Maybe Not. "Ever" is a really, incredibly long time. I'm going to go out on a limb and bet no one can answer a question like that about what they may or may not do at any point in the future.