The reason is simple, because in the end Naruto is the one who will always save the day. Naruto is the one who has to save all his friends, as the time goes by Sasuke is loosing importance in the manga, Naruto is the focus, in the first part Kishi had to divide our attention between two characters, Sasuke and Naruto, but Naruto was always the one who saved everyone, he is the main character after all. Kishi gave naruto too much importance, Kishi wants to make naruto a hero. First: Naruto was the one who had the idea of how to save Kakashi, the only thing Sasuke did was helping naruto. Second: Naruto was the one who saved Konoha from destruction; he stopped the strongest weapon both the sound and the sand had, Gaara. Sasuke helped him wounding gaara first. This shows Naruto has to deal with the strongest opponents, he always proves he can beat people stronger than him using his will of fire. So why can?t itachi be stronger than AL? First, because AL has to be the final villain, oro can?t be the final villain because Oro is not the strongest villain at the moment. Itachi is, and since naruto has to fight the strongest opponent and he can?t kill itachi (itachi is for sasuke) we can exclude Oro as the final villain, he simply would be killed by naruto easily, because naruto will at least be as strong as sasuke. Sasuke will beat itachi, if sasuke kills itachi that means he can kill Oro too, because itachi is stronger than Oro, and seeing naruto in the final battle defeating the second strongest villain (Oro) will not have the same impact because that means Sasuke defeated the strongest in the end, and that will not happen. Now, if people say I?m wrong then they must admit some facts: - If Oro is the final villain, you are saying Oro>itachi. - If Oro is the final villain, you are saying naruto will be the one to kill Itachi. Because naruto is the one who has to kill the strongest. - It?s a given that the AL is someone Naruto will kill because he is the leader of an organization who made Gaara and all his jurikiris companions suffer, but since the AL will be weaker than Itachi that means that fight will happen before the last confrontations and that only Itachi will survive of all akatsuki members. Meaning Naruto will both kill Akatsuki leader and the strongest and more menacing villain in the end of all. - Oro will be the final villain and we will always question who is the strongest of all ninjas in this generation, Sasuke or Itachi (some would love to see this). Leaving Naruto and the Al with the third and fourth place. - Oro is the final villain and the will of fire is shit because there was someone who didn?t had the will of fire and managed to be stronger than naruto and itachi.