Do you understand how many chapters it takes to make 1 episode???? The average chapters takes 2-3 chapters/per Episode.
Right now we're at 68 chapters ahead of the anime
So if you take 20 episodes x 3 per chapters = 60 chapters being animated leaving 8 chapters or less. By the time, the chapters will be 28 chapters ahead and that means it will be another 9 episodes .
The total amount of time we have is 37 weeks, which is less then a year which is not alot, as I said before, if its alot it should be 1 and half years or more.
By the time it caught up to the anime, we would probably have 100 + worthless fillers of random or flashback fillers . Unless thats what you would prefer?
Be grateful that we're seeing one of the best Naruto fillers since the War fillers. Would you prefer a filler that is Completely
relevant/ connection to the War plot or would you prefer a filler that has worthless flashback or random fillers that has no materials or story to the plot.
Anyway, even though its just a fillers, I evene considered as canon cause in the fourth great shinobi world war in manga, it was a Huge disappointment to many us fans that we didn't get to see the rookies spotlight, the fight was too short or it skipped, and no overall plot since you don't fell like real War.
The studio Pierett decided to make the fillers ALL FOR THE SAKE TO MAKE THE 4th Shinobi World War THE BEST ARC EVER!!
Props to Studio Pierett!!!
Think about it by the time the anime makes 20 episodes the manga will have made 20 new mangas also and the anime still wouldn't catch up