For evidence, we need to look no further than the post that James Gunn was responding to concerning the design of the suit in “Superman: Legacy.” “Trunks belong to a Superman costume like the S on the chest!” wrote @superfavocosplay. “Also, the emblem on the cape. If there will [not be] a Superman costume, then don’t make a Superman movie. Create a new superhero if you don’t like the real Superman design.”
In general, Gunn himself was also quick to point out how much conjecture he’s seen from those on both passionate sides of this debate after another fan asked him not to put the trunks on the Man of Steel in “Superman: Legacy.” “You wouldn’t believe the amount of pleading and upset I get based around trunks or no trunks,” he wrote. “To me, not the most important aspect of Superman or his story. But so many strong feelings!”
Though we still have very few details about the upcoming DCU film outside of casting and characters, these answers do at least allow both sides of the debate to maintain hope that they could get the suit design they want. In the meantime, we’ll just have to endure a few more months of folks on the internet arguing about an alien in his underwear.