Yea I have seen, I follow naruto every week. So I DAMN WELL know the situation. I meant the filler will end by April or late April, after Studio Pierrot is done with Tokyo Ghoul. And this isn't part 1 naruto, there may be no prelims. Its the final stage after desert most probably and Akatsuki doesn't have to pull shit, this filler is not cannon to the story.
I don't see how you think the akatsuki won't involved because if that's what you're trying to imply then you missed the whole point in this arc. From the very beginning, Tsunade and Gaara made an arrange agreement with regarding a way to lure the akatsuki out by hosting a chuunin exam as a centered focus in order to capture and grasp more intel from the organization.
This arc takes place between pre-timeskip and post timeskip so It doesn't matter if it's a filler, as long as it's relevant to the canon and it fit the context timeline of this series then it's all good. This isn't the first time where Akatsuki captured jiinchiruke in a filler. Look what happen to the 3 tails and 6 tails arc for instance.
The very same thing will have the same result to the 7 tails and I heard that according to the databook, Fuu the 7 tails were the first Jiinchiruke to be captured before Gaara and keep in mind this is canon.
We saw Pain earlier and they send their rain ninja to the chunnin exam to avoid being suspicion. Amoung the Rain ninja, it was confirmed by the director that the purple hair girl is the future animal path of pain which mean she will most likely die in this arc.
Basically Kishi could'v done the same thing to this arc but because he missed the opportunity since he doesn't have time to fill in the gap and instead made everyone chuunin as end result spoilers, he had to rely on the studio to do the work to know what he had envision
So this isn't just chuunin phase and the akatsuki we're dealing with, but also the sand rebels, Asuma/Kurenia/Gai/Kakashi still have roles to do, how will Gaara manage as a Kazekage and lastly but not least the Candidate of the chuunin exam that we're still currently in. We have ALOT to cover so it's not possible to end in 5 -10 episodes especially this past 3 episode have been entirely focused on team Neji and Shira and next episode is still heavenly on them. This filler arc is going to have the same length as Part 1 Chuunin exam.
You should know well that Naruto fillers tends to end in 4- 6 months and just because there's new opening in April or because the staff are done with Tokyo ghoul doesn't mean the canon will resume for Naruto.
Since this season of Tokyo Ghoul only have 12 episodes that mean it will ends in Mid march by then