No, this is not legal. Copyright gives the copyright owner the sole or only right to create derivative works or adaptions, which includes works in other media. Trademark gives the trademark owner the sole right to use any trademarked characters, in any media. What you propose would be a violation of both copyright and trademark (the latter assuming that the characters are trademarked, but its certainky possible they are not; but all published booms are copyrighted) and is illegal; you could potentially face significant liability for doing this. There is a reason, for example, you never saw lots of Harry Potter comic books, despite how lucrative they could be--no own could create them without Rowlings permission.