This is a great mashup of the song “In the End” from Linkin Park. Really puts a tragic spin on Jack’s quest:
In many ways it is a kind of pessimistic story – after all, Jack routinely fails to return to the past, despite epic heroism. He really does try hard, but in the end it doesn’t seem to matter, at least not to the billions enslaved by Aku throughout time. However Jack is making a difference to the people in the future who he liberates from Aku’s reign, so perhaps that is the true measure of his destiny.