I'm sure Sai's plan wasn't part of Shikaku's plan lol Shikamaru would have explained itThey still have sai
Then Shikaku and everyone else at Headquarters died in vain.It wasn't even a plan... "give everyone huge ****ing chakra to do huge ****ing jutsus" is not a plan. A 5 year old could have figured that out.
That was the plan...and it failed.I thought that the whole naruto sharing chakra to all of them was the plan. with it they did manage to separate the juubi from madara and tobi (kill it's brain sort of speak)
I'm guessing the rest of the plan was a way to seal up the juubi from that point but since it retaliated with a big storm that caused naruto to use up all his chakra to protect the shinobi they could not do that part anymore.
but yeah, the kage coming at the time they did was a lucky strike and a life saver for the shinobi