Here I'll try to prove in 5 points why in my opinion current Orochimaru should be able to enter SM.
1. We all know he trained in Ryuuchidou and mastered Senjutsu chakra gathering, but didn't have a body strong enough to enter SM.
2. We know that a human sacrifice is needed when using Edo Tensei. Also, the human sacrifice is a vessel for a soul and ashes and dust make change the appearance to that of a summonned person.
3. Hokage were brought back to life using Zetsu as sacrifices.
4. Both Minato and Hashirama could enter SM where in fact their bodies were Zetsu.
5. And guess what... Orochimaru also possesses Zetsu body...
So basically, Edo chakra comes from their souls - that's why for example Edo Hashirama can use Mokuton, but the sacrificed bodies have to be strong enough for Edo zombies to utilize SM if they know it. Manga has already shown that Zetsu body is enough and that's why I strongly believe that current Orochimaru with already mastered Senjutsu chakra manipulation and gathering can surpsire us
1. We all know he trained in Ryuuchidou and mastered Senjutsu chakra gathering, but didn't have a body strong enough to enter SM.
You must be registered for see images
2. We know that a human sacrifice is needed when using Edo Tensei. Also, the human sacrifice is a vessel for a soul and ashes and dust make change the appearance to that of a summonned person.
You must be registered for see images
3. Hokage were brought back to life using Zetsu as sacrifices.
You must be registered for see images
4. Both Minato and Hashirama could enter SM where in fact their bodies were Zetsu.
You must be registered for see images
You must be registered for see images
5. And guess what... Orochimaru also possesses Zetsu body...
You must be registered for see images
So basically, Edo chakra comes from their souls - that's why for example Edo Hashirama can use Mokuton, but the sacrificed bodies have to be strong enough for Edo zombies to utilize SM if they know it. Manga has already shown that Zetsu body is enough and that's why I strongly believe that current Orochimaru with already mastered Senjutsu chakra manipulation and gathering can surpsire us