Disclaimer: Most of the users of this website are game developers, not lawyers. Keep this in mind with regards to any legal advice received here.
If you have concerns about running into copyright issues, or about the legality of the publishing of your game, there may be an answer to be found. If a question is about possible legal worries, use this tag to indicate such.
Furthermore, in many jurisdictions it is illegal to give legal advice without having a licence to practice law. Use caution when answering questions.
See also: licensing