orochimaru can't be summoned since he resides with nagato
itachi already killed his parents once, doubt he would have to blink to do it twice
kabuto already said he couldn't summon jiraiya since his body&dna are in the sea, though tobi could make it possible

Quote Originally Posted by MFauli View Post
Whatever it is, it better be some powerful trump card. Taking on Itachi and Sasuke at the same time, well, you´d have to be series end villain material to manage that. Though I kinda find it bs that Itachi and Sasuke are teaming up. It´s just not believable.
how is it not believable that 2 brothers (1 who gave up everything for the other) are teaming up?