6. Hawke Companion. This is just me, but have your PC Hawke as a companion who's behavior is dependent on how you handled him/her in DAII. I've never seen anything like that before and I think it would be pretty cool to be able to semi-create a companion who could be any kind of character you'd want to venture out with. Even with the limited choices in DAII, there's still a lot that Hawke did in that game that can greatly affect how the character interacts with the world.
Maybe you could play the both in 3 like you could split up your squad in Kotor 2.