>>91799697Let's look at the options.
- Jack goes back and fixes the past. Time travel in SJ is a single, changeable timeline. Everyone he knew in the future is never born.
- Jack goes back and fixes the past. Time travel uses the many-worlds interpretation. An alternate timeline is created. The whole premise of the show, to "undo the future that is Aku" is shown to be a lie, because nothing can ever be undone.
- Jack doesn't go back in time. The many people that Aku slaughtered stay dead, but the many people who exist in the future get to keep on existing.
I think ultimately, the last option is the most likely one. The very premise of the show suggests that there's only one timeline. So Jack will have a revelation about what his quest ultimately means, and will either forsake that part of his quest and/or flat-out die in a noble sacrifice, so that the many people he's personally saved will keep on living.
