I'll be interested in whatever Telltale's team decides to do. I've yet to see them completely abandon a property's fanbase -- that is really not what they do. At the same time, I'm pretty sure everything will be in 3-D to keep animation costs down and quality reasonable.
Personally, I'd like to see King Graham operating in a KQ 7 mode, with humor and personality. And I'd like to see some nods and references to the series' history. But I don't want the new series to have too much unquestioning respect for what has gone before, either. Let the new King's Quest take some chances -- it's not like the old games are going to disappear if the new one takes risks that don't ultimately work out. I'm expecting a traditional adventure game, but I hope the tone and look surprises me.