Splitting hairs. Time travel, time reversal, same kind of fantasy. Going backwards in time is going backwards in time, whether you do it in a single centuries-long jump or second by second. (Imagine H.G. Wells's Time Traveller setting his machine into reverse at the lowest speed setting, and you'd get approximately what's shown here.) I doubt the physics will make any kind of sense, though the visuals and plotting should be interesting.
Amusing that a Nolan film co-stars a post-Nolan Batman (Pattinson).