I think what he finds in the tablet will probably cement his hatred towards Konoha entirely. It's likely he will try to either kill the elders or be found out when going there with Orochimaru. At which point he will defend himself, kill the elders and bust Karin out of prison. Nobody left in Konoha stands a chance against Sasuke or Orochimaru right now.
I'm still hoping we get an Edo Konohomaru.