Sasuke, Orochimaru and the Scroll
So since we are currently at Obito's side story I was thinking where Sasuke and Orochimaru went and what was in that scroll
Scroll when found "This could change the tide of the war"
At first I thought it was some summon for the Great Sage Snake or a super Edo Tensei or Info about the Rinnegan etc til he revived Orochimaru and then Sasuke had that moment of "What is a clan, village..country" then wanting to go to "The ones who know everything" (seems to be Ones, not One), plus we now know about the Rinnegan evolving from EMS+Senju or w/e thanks to Madara
So with the "Clan, Village and Country" thoughts Sasuke had coupled with "Knows Everything" I can only assume that where they went was to the Burial grounds of the So6P's two sons and Orochimaru already talked to them before (seems like he has since he had the scroll and agreed to take Sasuke) probably with Edo Tensei and wasn't strong enough to control them so he unsummoned them and only talked to them for info about the past, So6P, Uchiha/Senju etc.
Why Sasuke wants to talk to them not sure..but I think thats where they went..to Edo Tensei the Sons so Sasuke can find out what happened to start the cycle of hatred
TLDR; Oro and Sasuke went to Edo Tensei the 2 Sons of So6P, tho they can't be controlled they tell a good story.