A. The scroll gives some kind of power, which allows the user to control the war.
B. Sasuke wants to use this power, to meet a certain person, who happens to know, what Sasuke defines as "everything".
C. "Everything" most likely has something to with Konoha, the Uchiha clan, and whether, Itachi's choice was right/wrong.
D. As a result, Sasuke wants to know, which purpose, he should use his brothers (and his own) eyes for.
Your theory doesn't really fit above factual parameters, so I deem it unlikely. It's more likely to be a person, who knows what Itachi went through, and who knows a lot about the Uchiha clan and Konoha.
Possibilities:
A. Shisui
B. Izuna
C. Madara
D. Hashirama
And the list above in order, of which I deem more or less likely. If it's anyone outside this list, I will truly be amazed. The power in the scroll could be anything, it's not possible to say. Edo tensei alone would not let anyone take control of the war. It's more likely to be some even greater unknown jutsu.
Madara is my own little favorite. I still don't see the alliance being a match for him. I think only another EMS Uchiha could truly face him. Possibly the scroll contains the power to overtake an edo tensei summon. Thus it could be used to gain control over Madara (perhaps they need his DNA, thus went to Konoha to find it). Sasuke summons Madara to where he is. We get to see team Hebi +Orochimaru -Karin. Amazing setup, and Sasukes Susanoo will have its first real test. Oro will also show a new huge power-up. We never ever saw him getting real serious.