>Jack has aged, he's in his mid 50's
>Jack hasn't given up on fighting Aku's tyranny, but he's tired
>doesn't have his sword, Aku has it
>it's very difficult for Jack to win and survive without his sword, has to use technology to fight and has to hide from/dodge/escape from Aku
>Aku is also tired. Even with the sword in his possession, he can't manage to kill the samurai. He doesn't try as hard any more, he figures old age will take care of Jack before he could ever recover his sword and vanquish him, and even if he gets back to the past, he can't do dick without his sword. Also enjoys seeing Jack struggle and leaves him alive for entertainment, at this point.
>every episode is a self-contained adventure, each one has Jack struggle with all his might and have his outlook on morality and humanity tested. It's arguable whether or not his victories even mean anything, but he never stops.
>Daughters of Aku are still a thing, but they're not really Aku's daughters. Just warrioe Aku occultists.
>Ashi is the last survivor, like the show, but she does not join Jack.
>she follows Jack throughout the show, getting a couple minutes each episode to reflect on Aku's world around her and Jack's noble actions she witnesses. Her outlook slowly and reluctantly changes.
>in the beginning of wrapping up the serues, Ashi steals back Jack's sword from Aku's lair and returns it to him
>Ashi never speaks and doesn't change her look, yet she now follows him. Jack understands.
>Jack amasses an army, and rather than a few friends and groups he helped in the past, he is joined by the entire new generation, a massive amount of Earth's population that grew up with Jack's presence in their world. This is a shift 30 years in the making.
>Jack, without finding a way back, defeats Aku, thanks to help from the Earth finally rebelling against Aku en mass
>Jack can't find a way back to the past, but he can continue to build a new, bright future