“And then I had to be really secretive about Batman stuff.
Nolan, of course, famously put his own spin on Batman with theDark Knighttrilogy several years ago.
“The maximum workout I do most of the time is a casual stroll.

Credit: Warner Bros. Pictures
John David can run all day long.
It was good that I ended up being pretty fit.
But definitely, at the beginning, there were days I just could not walk afterwards.”
(Remember what we said about Nolan’s secrecy?)
The film will open in select U.S. theaters on Sept. 3.