Is explaining that sakura reserves where cut in half.
And shows her using the regenration technique alone. The same one that Shizune had to do with the help of about 6 other medics.
They are foreshadowing the byakugou seal.
Sure, so bad that they doing this in a filler season instead in canon materials.
Just make you remember why this filler is non-canon:
1.Shibuki was a filler character from an OVA from Part I Naruto.
2.All Akatsuki member told already that the Beasts had to be sealed in the rank of their tails, which means sealing the Nanabi technicaly had to shatter the Gedo Mazo. Same goes to the Rokubi fillers, where they sealed the Rokubi after they sealed the Nanabi while in the manga they already sealed all of them before tasking Sasuke to hunt down the Hachibi.
3.Tons of filler characters!