It is proof that he wanted the Pnei Menachem as Rebbe after him (known fact).
BUT not that Reb Yaakov Aryeh can't ever be Rebbe.
He writes, that on this particular subject the decision is on the Gerer Rebbe, meaning whoever it is at the helm at the time, be it his brother the Pnei Menachem or son Reb Y aakov Arye or even Reb Shaul Alter
I don't think there is a Gerer Chusid out there that disputes the fact that the Gerer Rebbe's father Reb Simcha Bunim wanted his son to succeed him.
The Will does not make the present Rebbe R' Yaakov Aryeh the Rebbe. Chassidim are arguing that after R' Simcha Bunim was nifter the Rebbistiveh should have reverted back to the Pnei Menachem's son who is R' Shaul Alter.
But Shlomo is not the sharpest blade in the drawer! You can have a lot of money but you still cannot buy brains! The will proves nothing! Back to the civil war!
בוםםםםם!!!
— גערער וואטסאפ (@gurWhatsApp) January 11, 2022
צוואת רבינו הלב שמחה!!!
יעקב אריה אלתר אינו האדמו"ר מגור!!! pic.twitter.com/dFbZrKRItm