Assuming Naruto is dead is extremely far fetched. Do any of you have any idea how trailers work? They're meant for you to think things like that so you would watch the movie. My bet is Boruto thinks Naruto is dead but turns out he isn't. Normally when it's an event that big they keep it out of the trailer.
Somebody was holding Sasuke's headband. That's something you'd expect to see if he were to die. Not to mention Bolt would cry if his sensei died as well. Meaning Sasuke is just as dead as Naruto according to the trailer. Obviously, neither of them are dead. It's just drama.
Also, regarding Sasuke and shadow clones. The thing is they aren't hard to learn, they just waste a lot of chakra. Something Naruto is willing to have happen than Sasuke is, considering Naruto's chakra.
The point is the leaked trailer is just to get us hyped. It's typical marketing.
Somebody was holding Sasuke's headband. That's something you'd expect to see if he were to die. Not to mention Bolt would cry if his sensei died as well. Meaning Sasuke is just as dead as Naruto according to the trailer. Obviously, neither of them are dead. It's just drama.
Also, regarding Sasuke and shadow clones. The thing is they aren't hard to learn, they just waste a lot of chakra. Something Naruto is willing to have happen than Sasuke is, considering Naruto's chakra.
The point is the leaked trailer is just to get us hyped. It's typical marketing.