I reckon that was a pretty good chapter - that will set up things quite nicely in most areas.
Firstly, with Tobi about to revive the Juubi - this brings scope for some interesting action with Naruto/Kurama and the gang vs. Tobi. Maybe, there will be some stuff Kurama wants/has to tell him that will unlock something. Perhaps. This is only speculation. In a way, it would be cool if it happened.
Also, regarding the one who knows everything, I have a strong feeling it may be be one of the hokages of the past - I know I may be voicing something people may have already pointed about, just adding it anyway - as right now, wht is of most relevance to Sasuke is his background and his history; and this could be quite crucial in the near future. And the people most likely to be able to enlighten him with this information is the deceased/sealed hokages as they are likely to have some interesting/relevant information of the Uchihas etc. As to who it might be specifially, I am tending towards either Hashirama Senju or Hiruzen Sarutobi as these are the ones who were most 'involved' so to speak with the Uchiha - their formation, and the demise.
Another person who it could be - as mentioned in a few posts and some predictions is Fugaku and Mikoto Uchiha (Sasuke and Itachi's parents) as they are not sealed, and could be brought back as an Edo summoning. Just a thought.