I've seen 3 or 4 threads like this but as its relevant to the current Manga i'll give my take on what Itachi's gift to Naruto could be in light of the recent chapter.
Lets start by examining the facts. Here's the chapter where Itachi initially gives his mysterious gift to Naruto:
Notice above that Itachi gives his power to Naruto after hearing his answer to what he would do if Sasuke were to attack Konoha. So this establishes one fact straight away: the gift was directly related to Sasuke, specifically helping Naruto to stop Sasuke, if and when needed. Upon hearing Naruto's response Itachi was satisfied by it and gave him the crow, meaning there was a possibility that had naruto said something arrogant that he might not have received any powers. After all, Itachi put his bro Sasuke before the whole village, and Danzo later commented that leaving Sasuke alive was Itachi's only mistake. So perhaps giving Naruto powers to stop Sasuke is Itachi's way of making amends for that one mistake he made when he let his brother live when the uchiha clan were massacred. I say stop, but let me be very clear that whatever power there was was a non lethal type, i refuse to believe that Itachi would want to see Sasuke dead after all that happened. So thus far it seems that Itachi's power was meant to help Naruto to:
1. Stop Sasuke
2. Not kill him
These seem fairly certain points right now. But now lets take a look at the most recent chapter, and what it shows us:
Before starting here, i just wanted to point out one thing: a lot of people gave a huge amount of importance to itachi's line 'I hope the day never comes when you have to use it'(last pic^). I feel he said that because he hoped that Sasuke would return to Konoha, not because of the nature of the powers or any adverse affect they may have on Naruto. Like when he meets him now, he straight away says ' What's become of Sasuke?':
You can see the pain and shock on Itachi's face when he learns about what happened.So that line of i hope you never have to use your powers meant i hope sasuke doesnt turn dark side, in other words.
The point i made earlier about the powers being directly related to Sasuke are further validated here:
'I was right to trust in you after all...' he says that after naruto says his plan was always to take care of sasuke. Meaning taking care of sasuke was also the purpose of the powers given to naruto, this much seems to be obvious now. Naruto is surprised by this statement, meaning he was referring to the powers given way back then.
Then there is the last page:
Itachi activates his MS, and the crow makes another appearance . Potentially this could mean that every time somebody activates a MS the power kicks in OR itachi deliberately turned the power he had given Naruto 'on'. This possibility i doubt, both Itachi and Nagato at this point were under kabuto's control, and as such their bodies and whatever actions they did were not their own. This then leaves us with the option that everytime someone activates a MS in front of naruto his powers given by itachi get activated.
Of course, this is not a fact, but it appears to be a distinct possibility after what has been shown.
So, my guess is that as the crow appears again at the end, it has the power to nullify the powers of the MS, ametarasu, tsukiyomi and susanoo or any other MS tech's will be rendered ineffectual or inaccessible for the user who naruto is up against. It makes sense, as that way the user(lets say Sasuke, whomitachi intended the powers to be used against) won't die but 90 percent of his powers will be negated if this were to happen. Its important to note that Sasuke now has EMS, and knowing kishi it probably won't be that easy for naruto when these two fight, but still i think the power given by itachi will work partially, and it'll be upto naruto with his new powers of his control over the kyuubi to do the rest.
Lets start by examining the facts. Here's the chapter where Itachi initially gives his mysterious gift to Naruto:
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Notice above that Itachi gives his power to Naruto after hearing his answer to what he would do if Sasuke were to attack Konoha. So this establishes one fact straight away: the gift was directly related to Sasuke, specifically helping Naruto to stop Sasuke, if and when needed. Upon hearing Naruto's response Itachi was satisfied by it and gave him the crow, meaning there was a possibility that had naruto said something arrogant that he might not have received any powers. After all, Itachi put his bro Sasuke before the whole village, and Danzo later commented that leaving Sasuke alive was Itachi's only mistake. So perhaps giving Naruto powers to stop Sasuke is Itachi's way of making amends for that one mistake he made when he let his brother live when the uchiha clan were massacred. I say stop, but let me be very clear that whatever power there was was a non lethal type, i refuse to believe that Itachi would want to see Sasuke dead after all that happened. So thus far it seems that Itachi's power was meant to help Naruto to:
1. Stop Sasuke
2. Not kill him
These seem fairly certain points right now. But now lets take a look at the most recent chapter, and what it shows us:
Before starting here, i just wanted to point out one thing: a lot of people gave a huge amount of importance to itachi's line 'I hope the day never comes when you have to use it'(last pic^). I feel he said that because he hoped that Sasuke would return to Konoha, not because of the nature of the powers or any adverse affect they may have on Naruto. Like when he meets him now, he straight away says ' What's become of Sasuke?':
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The point i made earlier about the powers being directly related to Sasuke are further validated here:
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Then there is the last page:
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Of course, this is not a fact, but it appears to be a distinct possibility after what has been shown.
So, my guess is that as the crow appears again at the end, it has the power to nullify the powers of the MS, ametarasu, tsukiyomi and susanoo or any other MS tech's will be rendered ineffectual or inaccessible for the user who naruto is up against. It makes sense, as that way the user(lets say Sasuke, whomitachi intended the powers to be used against) won't die but 90 percent of his powers will be negated if this were to happen. Its important to note that Sasuke now has EMS, and knowing kishi it probably won't be that easy for naruto when these two fight, but still i think the power given by itachi will work partially, and it'll be upto naruto with his new powers of his control over the kyuubi to do the rest.