I hope Sakura will appear within the next 10-20 chapters, depends of Kishi's phase. He's either going too slow, or too fast. :/ The beginning of this arc was slow, but the recent chapters have been so fast. I wish he could find a nice balance, like the good old days.
Kishi did have a good balance from the Reunion to the Itachi Pursuit arc, back then when it was the 5 kage summit, I thought there would be some war between the Leaf and Cloud, but then kishi put in the 4th shinobi world war and I saw that as a precursor for the end of the series. The entire story could have gone much longer if factors such as the other jinchurki were touched upon or if he did something different with the 5 sage artifacts like them needing be items needed in a ritual to revive the ten tails but were hidden long ago, that could have given more mileage to the story.
If anything I wish he did more with some characters in the 4th shinobi world war, I mean when it came to Sakura, though the white zetsu event was nice, I really wish there was screentime of her facing the 7 swordsmen like fighting haku while kakashi faced zabuza, or even just helped face another one of them. When it came to this war arc, kishi not only had to give a little time to those introduced in the 5 kage summit, he had to pull in so many others we had not even seen, this included:
-Han and Fuu-only 2 jinchurki we never saw in any media
-Hanzo from the lore, he was powerful but miniized
-The remaining 5 or 6 members of the 7 swordsmen we never met until then.
-The kage of the other villages we have not seen before.
-The gold and silver brothers, etc.
However it was in this war arc, there were so many opportunities for other development, I mean neji facing his father would have been good. Sakura too, just like how many wished she faced kabuto back in the sasuke and sai arc (a second medic battle), she could have done more in the seven swordsmen fight or better yet, one fight which would have been good is if she had to end up facing Chiyo, imagine if there was a fight between Sakura and chiyo and gaara came to help as well, this fight would have been perfect for them to team up, Sakura had a connection with Chiyo, Gaara would have done it to return her to the afterlife as thanks for not letting her own sacrfice to revive him go to waste. Sakura and Gaara would have been able to let chiyo know the world was changing due to the allaince and how both of them used to be foes but it was Naruto who did everything. Kishi missed this perfect opportunity. I mean yeah Gaara faced his father and forgave him, that was still excellent but there was so much else which could have been done.