flawed.
1. thats a assumption minato's too fast to be catched off guard so idk how orochirama will poison him. and link me where orochimaru used poison to paralyze someone b4?
2.yea ok thats why the 3rd hokage owned them. minato>old hokage
3.minato has a sensor technique from the 2nd hokage which he is able to sense his enemies he can just do that and doge orochimaru or find where he is.
4. not to mention he had a huge sealing arsenal from the uzumaki clan which can deal with the edo summons.
There is some minor problems here.....I'll start with the most important one.
EXPERIENCE, Orochimaru wins that.
INTELLIGENCE, Both are tied.
NINJUTSU, we'll say for the sake of argument that both are tied.
SEALING, because Shiki Fuujin cannot be used, they are both tied because Edo Tensei involves a great deal of sealing.
STRENGTH, Orochimaru wins.
SPEED, Minato wins.
TAIJUTSU, we'll go with tied.
SUMMONING, Orochimaru wins.
STAMINA, Orochimaru wins.
DURABILITY, Orochimaru wins.
Here's the kicker to all of this, Orochimaru has KNOWLEDGE of Minato's techniques, Minato does not.
The only foreseeable way for Minato to win is to seal him using Shiki Fuujin, which would count as suicide. Orochimaru wins more often than not.