I also think these match up's would be more interesting to see.Naruto, KB, Gai and Kakashi would have been able to beat Kabuto maybe faster than Itachi did it. Gai's Hirudora and Kakashi's Kamui would be a perfect combo to battle DSM Kabuto in that terrain and the Jinchurikis can break out of any type of Genjutsu control so it should be a stomp.
Now the Gokage vs Obito looks like a better fight than them versus Edo Madara. I think Obito will win because of the Kamui haxx and they have to battle 6 Jins with their respective abilities. If Naruto and KB found it hard to take on the jins there is no doubt the Gokage will struggle to beat them. Onoki's Jinton would get nullified by Obito's Rinnegan and same with the others.
Sasuke and Itachi actually have a chance to seal Edo Madara mainly because of Izanami. Edo Madara would get caught by Tsukuyomi and Itachi's and Sasuke's combined Susanoo's would be able to battle Madara's PS. Unlike the Gokage who failed to capitalize the outcome of the war, the Uchiha Bros would defintely be able to seal the deal.
These fights are much interesting than what happened in the original manga.