Marvel.com offers their Marvel Digital Comics Bundle for Free when you enter code COMICDAY. As soon as you enter code digital comics are revealed.
Note: After you’ve completed the redemption you can access your digital comic in the “My Comics” section of the Marvel Comics App and the Marvel Digital Comics Shop.
All New Ghost Rider #1
Dr Strange #1
Moon Girl and Devil Dinosaur #1
Powerman and Iron Fist #1
Black Panther #1