I'd love to see them do DARK KNIGHT, but think they would try to get Miller heavily involved with it -- maybe even direct? And his schedule is so booked up with Sin City 2, (and 3?), Spirit, and possibily a Ronin movie.

Kingdom Come... I'm not sure what style would work best for that.
Converting it to Timm/Cooke style just seems wrong. Maybe it could be a detailed computer generated movie, but I don't think they could do that well on DVD budget.