Shisui is not part of anything currently. Sasuke was ONLY thinking back on the memory of his brother. When he says "So he's still around", Sasuke is referring to Edo Madara, and NOT Shisui. After receiving the scroll however, Sasuke goes on saying "The one... Who knows everything..." followed by "...Anyways, There is someone I need to meet." Which he mentions is going to be Lord Orochimaru, as he needs him to do something. But here is the kicker from Kishi. Kishi is showing us a picture of Sasuke leaving towards where he thinks Orochimaru could be. Surprisingly, IT IS EITHER EDO MADARA or MASKED MADARA. Obviously this could be interpreted differently like:
A) Sasuke just thinks that the one who knows everything is indeed Edo Madara and he is going over there to talk to him, meaning that Orochimaru is somewhere else like in the curse mark. Think back on Sasuke vs Itachi, where Orochimaru poped up. [but even if it is the curse mark, as many of you think, Kishi shows a picture of Sasuke looking at the women's curse mark, really just discarding that possibility, and since Sasuke already saw the scroll, it discards the possibility of the scroll having information on how to get Orochimaru back through the curse mark.]
B) Orochimaru is somehow either Edo Madara or Masked Madara which is a very tall order. [But unlike Orochimaru being inside the Masked Madara somehow, there is defenetly a chance for him to be inside Edo Madara as for the curse mark. By the way, we've never actually seen a curse mark on Edo Madara through out his ressurection. That is why I say "It is a very tall order".]
C) Sasuke is going to ressurect Orochimaru since he now knows the seal to Edo Tensei [Though Sasuke did say: "He's a tough one. He's not going to vanish like that" Which does bring to support the curse mark theory. Sasuke could still have him inside that jar Itachi sealed him for all we know! (plot twist anyone?)]
See, there are defenetly theories that pop into anyones head as the person reads a chapter, but that is what this series, or any other kind of series, is all about. I never actually liked plot twist as much as other people do, that is why I try to actually think of possibilities rather than be amazed. Hell, I get more joy when I get things right! :kaito: