I still find it weird they made Sorcerers Shamans in AFR. I would not be surprised if some or all Shaman's get retconned to Sorcerers later.
Anyways there are supposed to be 12 classs cards (Druid, Cleric, Barbarian, Rogue, Ranger, Monk, Warlock, Bard, Wizard, and Knight/Paladin, Fighter/Warrior, and Sorcerer Shaman). Are these cards going to just be archetypical class creatures, legendary Archtypical class creatures, or somekind of Enchantment that makes a creature a member of a class? Maybe its Legendary Creature with a class tribal mechanic? Like Elminster with Wizards (people crunched the set, he can't be the Blue Planeswalker, that is likely Mordkainen after all, and FRs theft of Mord and Vecna is complete). Or they might be Archtypical Gods of Classes, Silvanus Druids, Asmodeus Warlocks, Mystra Wizards, Corellon Larethian Bards, Torm Paladin/Knights, Miliki Rangers, Sune Sorcerers/Shamans, Lathander Clerics, Tempus/Warriors.