Hero class reference picture analysis.

Why can't the hero with the shield...just be a Hero with a Shield using Brandish?

Who says they can't be plain ol' classes? Why can't the dude with the Bow just be a Ranger? Or better yet, a Wind Archer, since the entire point of Cygnus Knights were to combat the Black Mage anyway?

Knights of Cygnus are a new class in the chronology of the MapleStory world and hence why they can't participate in Ellin Forest PQ.

I don't think this image isn't meant to be speculated into much depth, and merely just cool concept art to show the Aran and their polearm. Nothing says they can't be Brawlers, regular Archmages, Bowmasters, and Shadowers, or its possible that Nexon didn't think that far into the future to plan what all the Hero classes would be like in the end.