Board Thread:Naruto Discussions/@comment-26636534-20160527151459/@comment-734582-20160601203558

Namikazenaruto9 wrote: if there is a will there's a way Like i said, there was a time constraint. How long is it between Orochimaru's death and the 4th war? a couple of months? in that time he used body modifications, learned sage mode, added the research of Karin etc to his body modification and then went around graverobbing and putting people under Edo Tensei. Considering he would need to sneak Jiraiya's body out from under Konans nose (who almost certainly would've been keeping an eye on it, similar to nagato et all), he almost certainly couldn't have done it until Konan was dead.

Then, he found Madara's corpse, which alone would've kept him busy drooling over it.

Also, Kabuto stated he had many Edo Tensei failures. So, considering the time taken, i'm surpised Kabuto managed to put so many people under Edo Tensei in the first place.