James Gunn knows comic book fans will inspect every inch of a new superhero movie for the slightest easter egg or "plot hole" or inaccuracy. That is part of the deal with a new DC film universe. Every costume choice, power detail and background prop becomes a debate. Luckily, he seems more than willing to answer the tiny questions with the exact kind of comic book logic that makes these worlds fun in the first place.
Recently, Gunn took to Threads to respond to a pair of fan questions about Kryptonian biology and superhero practicality, and both answers were delightfully comic book-y. One fan asked how Superman could shave if his skin is basically invulnerable, while another wondered how Supergirl, who is soon to headline her very own 2026 movie release, could have pierced ears if she is bulletproof. He did not treat either question like a problem. Instead, he leaned straight into the lore, replying:
