User blog comment:The Shadow Of Darkness/The Final Sonic Storybook Series Game Ideas./@comment-207.118.31.88-20120109235949

I can only think of Sonic and the Princess of Mars because Edgar rice Burroughs' book (A Princess of Mars) hasn't really been tapped for video games. And it is very open to the public. But I have doubts because I don't think the guys at Sonic Team have even read the book.