I think it is assured that Nolan is amongst the A-List in Hollywood right now, stacked right aside such talents as Steven Spielberg, Martin Scorsese, Michael Mann, et al. I'm sure whatever he does next is going to grab a lot of people's attention.
You are getting waaayyyy ahead of yourself now. Nolan amongst Spielberg and Scorsese? Are you nuts? These guys gave us one hit after another, all Nolan gave was Dark Knight. Let him give us a few more movies that are the blockbusters of their respective years and then we'll see.