Dragon Commander is the game that's more of a spiritual successor to DKS (what with the dragon feature and camera view). I know the RTS element may put you off but Larian has assured everyone that they've made sure that everyone enjoyed the RTS element (at least on the world map where things are turn based). Once you enter a battle, you take command of your dragon knight. You also rule a nation in which you can make many choices. One could say they took The Battle Tower from DKS and expanded it so you don't just have a few servants serving you, you have a entire army. It's got the exploration, free roaming, battle, action and RPG elements. I don't think you'd hate it, when has Larian failed with the Divinity series?
Project E (as Divine avenger said) has more in common with Divine Divinity (from what we've heard) and we can probably expect features from Divine Divinity being in project E. Whether or not The Divine One is the playable protagonist remains to be known. I'm hoping he is as I want to see him kill Damien but what with each Divinity game introducing a new hero, I could be wrong.