The DC Studios superhero movie is already a huge critical and commercial hit—but American audiences are seemingly the most enthusiastic about it so far.

Marvel and the DC Universe are widely viewed as rivals in the movie industry. And while Marvel has largely dominated headlines and at the box office in recent years, the James Gunn-directed Superman has taken the superhero world by storm.

Marvel Studios Chief Kevin Feige saw James Gunn's "Superman" at a Leicester Square movie theater in London – and liked it a lot.