Spoilers Spoilers Spoilers!

From the Warriors Wiki, it says that it is confirmed that Hollyleaf is the forgotten warrior, and that this book is "about how difficult it is to go back to a life you thought you'd left behind. It's also about forgiveness, and acceptance, and coming to terms with guilt."


The summary: The spirits of the Dark Forest are gaining strength, and Jayfeather, Lionblaze, and Dovewing must face the destinies that await them. Suddenly, an outsider appears in ThunderClan’s midst, spreading discord and turning Clanmates against one another. As tensions mount, the warrior cats will be forced to choose whose word they can trust—before it’s too late.
What this may mean...

• Hollyleaf appears, and Jayfeather and Lionblaze are forced to tell the clan about the prophecy
• The clan starts arguing about 1.) who the 4th cat is 2.) what to do with Hollyleaf 3.) Who's in the Dark Forest
• They have to figure out who is with the Dark Forest and who is not, and they must warn the clans.

More spoilers & rumors...

• Leafpool is the cat on the cover (chasing the squirrel) Erin Hunter said that she still has a big role to play
• Ideas for the fourth cat: Foxleap, Hollyleaf, Ivypool, Cinderheart, Squirrelflight
• It is rumored that there will be "a gruesome death in book six." Possibilities: Firestar or Brambleclaw? :( So sad!
• Jayfeather is rumored to get an apprentice in OOTS6