Board Thread:Wiki Discussions/@comment-2120712-20140905221512/@comment-945885-20140924020132

Yeah, there are six blank slots on the last page which are almost certainly for future DLC expansions, I think.

The only major characters they're really missing from the manga at this point are Jinchuriki Obito, Jinchuriki Madara, Six Paths Naruto, Rinnegan Sasuke, Kaguya, Mangekyo Sharingan Kakashi, and... maybe Guruguru and Eighth Gate Guy?