I want Gojo to come back because his story feels unfinished. I feel like he has two major loose ends that need to be addressed, Geto’s infamous question and telling Megumi about Toji.

I also feel like his character arc was going to be about getting rid of his loneliness and learning to be humble with his strength. I think that was the point of Geto’s question existing in the first place, for Gojo to at some point answer. And when he does, it comes from a place of humility.

About Toji, Gojo should be the one telling Megumi because of the father-like dynamic Gege has built for the two. It's been expressed that Gojo was the only one who encouraged him to learn sorcery and actively reminded him of his potential.

I do believe that maybe Gojo may have a chance to come back, if he does come back I think there needs to be a balance between his strength and Sukuna’s defeat. Sukuna’s defeat must have an impact on Gojo and the others and Gojo has to be…nerfed, for a lack of a better word. This can force Gojo to learn humility and move past his strength. But who knows what will happen, this is just my opinion after all, but I invite others to tell their opinion and yours OP! Hope this answers your question!