First it was a great idea to bring out all the past ninjas that was always mention.
But what I was waiting for is Konoha White Fang. Kahashi's father. why wasnt he revived? Or to make things more interesting have Madara brother who eyes he took come back and have some role. Im sure there are various other ninjas but those two spark the most interest with me. Wouldnt it be not an better fight scene to see why the White Fang was called more powerful than the Sannin? :shrug:
What other ninjas are missing i wonder.