It wouldn't be practical if it was scholar. We're about to start Beta Phase 3, with no official mention of it from Yoshi-P or anyone else. They would have to balance it, debug it, test it, etc. For them to go this far in the game without a mention, I doubt its what everyone thinks.

Classes may not have specific armor ingame, but its like Anonymoose said: it's probably a promotional piece saying "hey guys look what's coming to launch!" Especially those that weren't around for the jobs release, which came later in 1.0.

So the girl has a mortarboard and some loafers....in only one piece of promotional art with no prior briefing from the dev team...yeah I call this one Arcanist. lol