So Orochimaru and Kabuto are the only ones who can use edo tensei right?Because Kabuto is caught in izanami the only one who can currently use edo tensei is Orochimaru.So my theory is that the scroll contains the parents of Sasuke and Itachi.Because it makes sense because suigetsu said that Sasuke would be interest and who else would he ask about the clan and the villege except mommy and daddy.What do u guys think?
I do believe it may be his parents.
On the bolded part, due to Suigetsu not knowing who the hell Sasuke was talking about, I don't believe it to contain Sasuke's parents. I think it describes the edo tensei itself, which would make sense to Suigetsu saying "I bet you intend to ask Orochimaru to use the power in that scroll".
The very fact that Suigetsu was surprised that Sasuke wanted to meet someone at all, kinda proves that it has nothing to do with a person (s). Sasuke just got the idea on his own, at least that's my analysis of it.
Edit: Let's not forget that only three people knew how to use the edo tensei, Tobirama, Orochimaru, and Kabuto. It's very possible that Oro obtained this scroll from when he was apart of the village, afterall, he very much desired this tech and knew of it from Tobirama. I wouldn't put it pass him to go snooping around.