Not really multiple reincarnated as one could think but the thing just below that: time travelers.
Now about this book. I would give it a bof. It started not bad then 👎
Weird reason to give such a low rating. It's readable till around chapter 300. I don't know about after that because I didn't like the direction in which it was going
Very good fanfiction. One of the best of Naruto's I've read. But it deals with problems inherent to its premise. Being so far back in the plot means the author has to find some way to keep the story interesting while not changing the future too much (I'd personally have liked it even more if he just said f*ck it). It's just the protagonist fighting canon characters, killing those that where dead at the beginning of Naruto and keeping the rest. There was a brief moment when he came to the land of iron (or after fighting his first Otsusuki) that I thought there would be inedit plots but no (apparently most of the fanbase wanted interaction with canon characters). Also, he's OP and thus no tension in the fights (I just skip them). On the other side he could get way more OP, so many things he could be adapting to.
----- Rant below -----
One thing I dislike very much though (and that's just personal) is that the protagonist never has to dirty his hands. The author will always put a 'bad' guy in front to make him the good guy. For example, I disliked him saving the Uzumaki clan (it was logical but that wasn't the point) and all things that were consequences of it. He needed them to use their seals for him. He is absolutely invincible. I don't think they wouldn't grovel and do whatever he asks for to save their family. Also I wanted Kushina to die. Shame!
1.5 ⭐ really but I want to balance it out a little with all those nonsensical 5⭐ reviews.
From bad to worse: Chinese names, Yamcha treatment, translation (especially numbers), romance (really badly done, would've even been better if he was building his 3000 girls harem), long-winded, no real challenge, cultivation, author thinking MC is not arrogant enough, time travel (not the Trunks kind), the title of the last chapter (not sure if it's really that but I hate it). If you can bear with all that, then go ahead. You'll have something to do for one day.
I personally can't anymore so I'll be taking a break.