You might already know this if you're into the show but if you missed the pretty glorious return of Samurai Jack for season 5 you'll get to see it later this year if you grab the complete series on blu-ray or grab season 5 on dvd or blu-ray come mid-October.
For as many years as fans of the show were hoping for a movie (as GT was, by his own account) it's worked out for the best that the end came in a complete fifth season. Unlike another landmark cartoon from that 00's era, The Last Airbender, Samurai Jack doesn't really lend itself to that dubious and seemingly ubiquitous blight that characterizes television in the prestige TV era, the desire to spin off things endlessly into prequel and sequel stuff. I've had other things incubating in writing projects and composing projects so I haven't written "Legend of Entitlement" yet but I hope to get to that some day.
There's a potential plot hole involved but through the first four seasons we were shown that the sword could not be used against the innocent or the righteous. shown in a triumphantly ridiculous way in an episode of Samurai Jack that dropped so many allusions to Sam Raimi films it would be a waste of time to mention them all if you aren't already familiar with Raimi's films. But season 5 presented a plot point in which we're shown that while the sword could not be used to kill the righteous this didn't preclude the sword being used in unrighteous anger, specifically by Jack himself. Jack is forced to go on a journey where he discovers that he thought he had lost his sword in the most literal, physical sense when, it turns out, he had lost the sword in an ethical sense.
In contrast to Korra's endless quest for more power and varieties of power to perfect her status as the avatar, Jack has to reach a point where he recognizes that he lost the sword because his anger got the better of him, an anger that showed he had continued his journey out of, well, a sense of entitlement rather than service is how I interpreted the scenes. Jack had to cast off an anger that seemed legitimate and partly was legitimate, seeing how bad Aku was, to remember that led him to kill minions of Aku who had become so against their own will (since, viewers of the show will know that one of Aku's powers can include hijacking the wills of his targets). Along the journey Jack recovers his sense of proportion in pursuing the destruction of Aku, and the most important element in this journey involved helping those influenced by Aku's cruelty find freedom from that influence rather than simply striking them down as if they were defined by nothing more than their being the then-current fist of the shape-shifting master of darkness.
If you haven't already seen the end I won't spoil it, but I will see the final reveal was really, really funny. "Oh no."