As James Gunn's DCU launches with the premiere of 'Superman', his Marvel days appear to be in the past for now.

"No, I just shook my head. I didn’t feel that way because I was fired," said Gunn in response to whether he felt bad for jumping ship from Marvel to DC, on Armchair Expert with Dax Shepherd. "I didn’t feel guilt at all. I mean, I had to take a job! I took a job [with] people that I also really liked, and that was it."