What if after Naruto, Killer Bee, and Itachi beat Edo Nagato Itachi decided to go after Madara instead of Kabuto? (http://www.comicvine.com/forums/battles-7/madara-uchiha-vs-itachi-and-sasuke-1483131/) Naruto and Killer Bee encounter Kabuto in the cave and Guy and Kakashi join them. All are in character. Kabuto can use dragon sage mode, Killer Bee has Samehada, Kakashi can use kamui but isn't as skilled with it as his fight with Obito, Naruto can go into Bijuu mode for only 5 minutes at a time.
Round 1: Fight to death, they can kill Kabuto and somehow the Edo tensei will be released
Round 2: Fight to incapacitate (For Team), they have to incapacitate Kabuto (not kill him) in order to stop the edo tensei.