Other than DC, which other major comic book publisher did Morrison work for?
IDW Publishing
Image Comics
Marvel
BOOM! Studios
Answer
Other than DC, Grant Morrison also worked for Marvel Comics. He wrote several successful titles for Marvel, including The Invisibles, New X-Men, and Marvel Boy. He also co-created the character The Sentry with Paul Jenkins.
The Enigmatic Universe of Grant Morrison: Dive into the Mind of a Scottish Comic Book Mastermind