Intellectual Property Law
Intellectual Property Law Questions? Ask a Lawyer
hello. comic book characters/art are protected by copyrights owned by the publishing company such as DC Comics or Marvel Comics, so you would need to get permission from them (i.e. a license) in order to use the material. Now if the copyright had expired you would be free to use the material (but that is very unlikely given the timing...see here for a copyright duration chart https://copyright.cornell.edu/resources/publicdomain.cfm) but even without copyright protection there would be trademark issues since the characters are trademarked as well (names and images).
It would be the same, you need to contact the publishers of those materials. Copyright lasts a long time, general rule is Life of Author + 70 years, but see the link i provided above for detailed info on copyright duration. Starting with the publisher is your best bet, but often its just a matter of research (online etc) to find out the copyright owner, and sometimes you just won't be able to find or contact the owner, that's just a tough luck situation and it happens a lot, and in that case you either don;t use it or roll the dice (a little risk here but usually not an issue with things like this that have minimal commercial value/demand) and use it and hope the owner doesn't find out / care, or then works out a license with you....I have seen it work both ways.
you're welcome, best of luck
please rate me thanks