dont you think that would be boring
just think about all those flashbacks -_-
Dude they aren't just boring Kabuto flashback, they're important things we still need to know, there's alot of plot holes and we need those "boring" flashbacks to sum everything up, would you rather have Naruto end and still not know about alot of things? Or would you rather have a epic flashback beginning from the start of the Ninja World to the ending of the Ninja World, and I'm not talking about every specific hour, every page could move on years, similar to Kabuto small a few pages, then you see a picture of Kabuto a bit older, then next to that picture is another scene of what Kabuto is doing, then Kabuto a bit older and next to that picture again another scene.
A tiny bit before Rikudo Sennin
Rikudo Sennin
Rikudo Sennin's sons
Hashirama and Madara's birth
Hashirama and Madara at their teen years
Hashirama and Madara when they're adults and older
Hashirama vs Madara
What Hashirama did afterwards (could also contain Madara)
How Hashirama died
Tobirama
What happend with Senju clan
How Tobirama died
Sarutobi's prime, Danzo's prime
Minato
More about Shisui Uchiha and Danzo
More about Itachi
More about the Uchiha massacre
...
From the beginning to the end of the Ninja world ^.^