Hey I was bored, thought this would be "fun", so let's test it; Basically just reword Aku's speech from the opening of Samurai Jack, and that's about it.
"Long ago in a distant land, I Aku, the shape-shifting master of darkness, unleashed an UNSPEAKABLE evil.
But, a foolish Samurai warrior wielding a magic sword stepped forth to oppose me.
Before the final blow was struck, I tore open a portal in time and flung him in to the future, where my evil is law. Now the fool seeks to return to the past, and undo the future that is Aku!"