What if Superman, but evil? Well, you're probably pretty much effed, that's what. At least that's the gist in the new extended trailer Sony Pictures has debuted for Brightburn. Produced by James Gunn and written by Mark Gunn and Brian Gunn, Brightburn sees director David Yarovesky at the helm of what the studio is calling “a startling, subversive take on a radical new genre.” Superheroes and horror? Yeah, you bet I'm into it. Elizabeth Banks stars as a mother who discovers an extraterrestrial child (Jackson A. Dunn) who has crash-landed on Earth and takes him …