Doug Liman’s first ambition was to make “big, mindless entertainment”. The ‘Road House’ filmmaker always knew he wanted to work on blockbuster action movies but it was only when he got the green light to do that with ‘The Bourne Identity’ that he discovered he was actually more interested in characters. He told Empire magazine: “I always wanted to make action movies since I was a kid. “I remember watching the first ‘Superman’ up on a big screen in Times Square when I was probably six or something. I was like, ‘I want to make movies like that.’ “But you don’t get to start making movies like tha…