Nice theory 10/10 backed by mangafax. I'm curious about this new "Kaumi" ability.She would be too powerful, and probably use it better than Sasuke because she is a genjutsu type, and call a strong yin affiliation.
Kishi isn't letting that happen.
Though Sasuke has the rinnegan.
Even though she doesn't need it, I would still get my life.
I have a theory that she will remotely use Kaumi to get out of the dimension, using medical ninjutsu, on shin's eye.