WAIT THE HELL UP
I think Oro might have been up to wayyy more than face value shows. We knew he was after an uchiha body, and we also know that he was experimenting with infusing people with hashi's cells. And now, with kabuto's statement, we know that oro and kabuto were looking into the Rinnegan and how to unlock it.
See where I'm going?
I think that Orochimaru's true scheme all along was actually to get the rinnegan, not just the sharingan. The fact that this also allows him to do pretty much every single Jutsu that exists (excepting probably bloodline limits) supports my claim, as we all know that Orochimaru's main goal was to know all the Jutsu.
EDIT: Even more!
Because oro had kabutos memories, and setup the entire scenario where the Kages were summoned, he already knew that he was gonna get the zetsu body. And, again having kabuto's memories, he also now knows where tobi's hideout is. Which contains as many sharingan as one would ever need. Not only do I think he was aiming for Rinnegan, I think he still is aiming for Rinnegan.
Note: This is a double post. Please delete or close the other thread entitled Orochimaru's True Intentions, and I'll take a warning or whatever. Thank you.