Yes it will have a shitload of characters, pretty much every single one even slightly important for the plot shinobi up until the newest arc. Which means no sound ninjas, but we'll get Kabuto, Jiraiya, Shizune, Tsunade, Itachi, Kisame etc. And all the genins. Kiba, Shino, Chouji, Ino, Tenten...

A friend of mine is gonna send it to me when it comes out. Can't wait.