just show the kid star wars from the phantom menace to the empire strikes back, "first" trilogy is an innocent kid gets powerful and turns evil, the second trilogy is an innocent kid that vanquishes evil. and teach him that you can chose those paths or anything in between.
Watch The Seven Deadly Sins Online
The "Seven Deadly Sins," a group of evil knights who conspired to overthrow the kingdom of Britannia, were said to have been eradicated by the Holy Knights, although some claim that they still live. Ten years later, the Holy Knights have staged a coup d'état and assassinated the king, becoming the new, tyrannical rulers of the kingdom. Elizabeth, the king's third daughter, sets out on a journey to find the "Seven Deadly Sins," and to enlist their help in taking back the kingdom.