So, just like the show, Aku rains death down on everyone, the 300 and 1, and Scottsman’s daughters even are looking like they will die, and some of them are wounded to the point of it.
Aku cackles in victory as the last piece of the puzzle is laid waste at his feet, Ashi is about to deliver the final blow to Jack.
It’s then that like in the show, his words “I love you” trigger something in her to find strength enough to resist him. She defends Jack and counters Aku with his own power.
She regains the sword for Jack and creates a portal in time upon the revelation of the ability to wield darkness like he can.
Aku tries to stop him but he slashes him hurting him, and…although Jack doesn’t notice it, Ashi winces as well, but ignores this.
Either way they both jump through the portal.
But Aku noticed, and as they vanish, in thought, he finally cackles again, knowing what’s to come. He knows he still will win, even in the past.