in the beginning of the hidden inventory, mei mei and utahime figure out that in order to break out of the cursed hallway, they have to run at full speed in OPPOSITE directions, and then in the hidden inventory anime opening we see Gojo at one end of hallway, and Geto walking away at the other end, and this symbolizes how Gojo and Geto will cause the breaking of cycles of abuse and violence in the jujutsu world, which is one of the main themes of JJK, but can only do so by separating.
And the Hidden Inventory opening is Blue (like Gojo's power which attracts, like Gojo having Geto close to him) while the Shibuya opening is Red (like Gojo's power that repels, like when Gojo no longer has Geto), and this is why I believe Gojo will win against Sukuna in the final fight in Shinjuku using Purple, which brings them together, but it will kill him in the process, and bringing those two together to defeat Sukuna is the only way he can ever return to Geto, through death. The sacrifice for the breaking of cycles and bringing true change to the jujutsu world will be their love, and it all could only happen with them going in different directions, which leads Gojo to influence the next generation of sorcerers and train and protect them to be able to create a new paradigm, in this essay -