I actually think Itachi is planning on leading Sasuke somewhere, possibly to Kabuto so Sasuke can see what is going on. I want to say they will fight but I mean, what purpose does Itachi have? Maybe Sasuke would try to prove his power by attacking Itachi (who Sasuke won't believe is the real...
Now that a lot of the other summons are destroyed, i think Kabuto can focus all of his energy on those two. I don't think they will appear until after all other summons are gone but thats just my opinion
Oh i never caught the connection before! When he touched Sasuke's head after sasuke tried to do that shuriken thing, sasuke was good at it. hmmm that is something to ponder... Ya know, Madara did say that their are secrets of the Sharingan that Sasuke did not know about. Maybe since it can...