Since the beginning of the series, Geto has been shown to be the smartest tactician & is finally meeting face-to-face with Yuji for the first time. I think this meeting can probably be extremely significant for Yuji, Geto, Gojo & maybe even Sukuna long term
Geto is continuously shown to speak about binding vows a lot. He was the first to allude to using a binding vow in the manga when he mentioned Sukuna & Yuji’s situation. We also continuously learn more about binding vows throughout the series because of him.
I’m not saying this HAS to happen, but it would be very interesting if Geto somehow convinced Yuji into making a binding vow with him considering Geto currently is in possession of Gojo in prison realm. Geto could use Gojo as leverage to attempt to use Yuji for something
Geto could attack Mahito then bargain/agree to a vow with Itadori or he could just coerce Yuji with Gojo only. Either way, i feel this could have serious implications if Geto controls Yuji somehow with a binding vow, in turn having some control over Sukuna.
This control over Gojo, Yuji and technically Sukuna could lead Geto to whatever “New World” that he mentions to Gojo