Could have made a prediction in the old format but I'm short on time.
Sakura, Sasuke and Obito prepares to go back to the Ice world where Naruto is.
Suddenly Obito's health falters and he coughs out blood and fells unconscious.
Sakura checks and realizes that Obito can die anytime and doesn't have enough chakra to transport them back.
Sakura explains everything to Sasuke. Sasuke notices the mark on Obito's chest placed by Naruto.
Naruto and his clones fight against Kaguya and as the time passes the clones are reduced in numbers.
After many clashes, Kaguya notices that Obito and Sakura aren't seen anywhere but only Kakashi and realizes that those two must have managed to enter into the core dimension along with Naruto's clone.
In front of Naruto, BZ suggests Kaguya to go back and finish Sakura and Obito and then sasuke as well. Naruto worries.
Kaguya creates distance between herself and Naruto and returns back. Kaguya returns to the core dimension to search for Obito and Sakura. They notices the reaction happened on the sand because of the acid as well as blood. But they sense nothing. Kaguya then goes to "The sea of Acid" region and senses nothing.
She goes to the other dimension (which is not yet shown) But finds nothing.
She goes to the desert and finds Sakura's jacket.
In the ice world, a portal opens leaving Naruto and Kakashi shocked.
Kaguya returns back to the ice world and finds Obito and Sakura next to Kakashi and Naruto.
Naruto is shown smiling looking Kaguya's face.
Naruto makes another attempt and attacks Kaguya.
Obito thanks Sasuke in mind for the help and focuses on the battle between Naruto and Kaguya.
Obito chest is shown where the mark placed by Naruto has been overlapped by Sasuke's mark thus saving Obito from death.
Obito even already prepared to die now wants to live because of Sasuke's words.
As Naruto is about to make a blow on Kaguya he prepares the mark on his hand to place on Kaguya.
BZ laughs saying it's futile since he needs Sasuke to perform the sealing process. On which Naruto smirks.
Obito prepares his left Kamui and opens a portal behind Kaguya.
A hand emerges out of the portal having the other half of the seal.
Sasuke emerges out from the Kamui dimension behind Kaguya and is about to place his hand on Kaguya.
Kaguya and BZ shocks at Sasuke's sudden appearance and moves a little cross to dodge the seal. But both Naruto and Sasuke places their hands on Kaguya.
The remaining part of the prediction but not in the same chapter.
But the sealing fails leaving Naruto and Sasuke shocked.
Then it is shown that Naruto and Sasuke's hand weren't placed face to face and were at a little offset.
In other words, Hagoromo gave Naruto and Sasuke a power up through the hand-marks which by placing on one another can stop death. and by placing facing each other can seal the person.