Power of Three! (WARNING, SPOILERS!)

[hazel]

I've been peeking through some spoilers, and I found out that Hollyleaf is going to turn evil because she finds out she isn't one of the three. I've only read the Sight so far, but I'm ordering Dark River as soon as I can.

I heard there's going to be a fourth warriors series too. Anybody else have any thoughts on this, or what may happen in the last book in the Power of Three(if you haven't read it already, that is, we don't want it ruined for us!)?

[firewrath]

last book isn't out yet and I don't know about the evil thing.