The setting is the same, Aqua on the realm of darkness, consumed by it, Riku and Mickey searching her, she beats them up, so Riku asks for help to Sora, and magically, he appears, but the main difference from canon here is that, after that, she beats them up, again, they have no chance against her, why? Well, they have too much light, the darkness is unfamiliar to their bodies, so they weaken up. Anti-Aqua was about to give Sora the final blow, she's charging her blade to make the stab as painful and slow as possible

Anti-Aqua: "Last words, Sora?"

Sora: "Yeah... Aqua... Please... This isn't you... Come back..."

Anti-Aqua smirks

Anti-Aqua: "No... She's long gone... Now, I'm the only thing left... And now... I will take your life..."

she charges at him, but something stops her... You...