I think the last one I saw in theatres was Sin City 2.... Before that it was Guardians.... I think those are the only 2 movies I've seen in theatres this year.
I love Nolan, so I'm definitely going to see that opening day. Hopefully they do the secret early screenings. Some theatres that offer "midnight screenings" are now offering just plain early screenings, for those who have to work Friday and don't want to go at midnight. That's how I saw Super 8. We went to buy our midnight screening tickets and they had like 3 showings between 8 and midnight so we went right at 8. It's become more common, but they aren't advertised.