I forgot that when Hebi joined akatsuki after the itachi fight they learned about akatsukis plans to capture the bijuu... Sasuke was suppost to capture the hachibi and pain the kyuubi...http://www.mangareader.net/93-409-15...apter-404.html
So, suigetsu does know about akatsukis plans for the bijuu and the birds explained the war... I guess Oro could actually of found a way to take out the bijuu in order to stop the akatsuki.
Orochimaru and kabuto only seem interested in Rikudous sages powers (the RG+MS doujutsu) not the bijuu which are the akatsukis interests.
And with the knowledge of akatsukis plans with the bijuu and Oros hate of akatsuki I believe suigestus reaction say enough about the crazyness of Oro's Idea.."Eh.. This.. Orochimaru would even consider something like this. With In that case.. this data, can even be used to take control of this war".
:Oros following of akatsuki's plans, knowing so much it worried tobara dearly...http://www.mangareader.net/93-58427-...apter-515.html
:A crazy Idea such a eliminating the bijuu.
:The war being over the bijuu making theyre elimination formula capable of taking control over said war.
I thinks its plausible that Orochiraru planed on eliminating the bijuu in order to defeat akatsuki and suigetsu has found the data Oro gathered which left him speechless by its purpose. And, if it is the destruction of the bijuu then the data suigetsu has is key to controlling the war as he said.
And I remember Kabuto saying he was invincible because he has Edo tensai and "that" jutsu which IMO could be a jutsu to destroy the bijuu if tobi tried to use them against kabuto....http://www.mangareader.net/naruto/521/4
IDK, its a radical idea even for Oro, but it is the best way to stop akatsuki and control the war at this point.