Guess I was wrong in saying there won't be any classes:
From the latest interview:
Will the heroes have unique class feats or in the Divine Divinity manner each hero can develop any ability?
At the start of the game you will choose between Wizard, Warrior and Ranger. This only unlocks your starting skills, so in other words, you can still develop your character in any way you want.
Go
here for the full interview
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