It would be nice..

[Feelingless Shinobi]

Warning: Post will maybe have few spoilers for the anime viewers only, just saying.

If we had few more chapters after the end explaining and showing many things that the anime didn't, like the life of Jiraya and Tsunade and Orochimaru as teens, how exactly Obito ended up wearing a mask and having Madara's voice and in general more about Obito's life after he was saved by Madara to the point of his death, how the whole Akatsuki was created even from the first ideas of Obito, more about how people in Naruto world got ahold of chakra and managed to control it and create jutsus etc.
I think it would be really nice to have something like this but I know it won't happen.

 

[HashiraMadara SenjUchiha]

Kishi plans to have a few movies that would explain such I guess

 

[Spongebond]

Warning: Post will maybe have few spoilers for the anime viewers only, just saying.

If we had few more chapters after the end explaining and showing many things that the anime didn't, like the life of Jiraya and Tsunade and Orochimaru as teens, how exactly Obito ended up wearing a mask and having Madara's voice and in general more about Obito's life after he was saved by Madara to the point of his death, how the whole Akatsuki was created even from the first ideas of Obito, more about how people in Naruto world got ahold of chakra and managed to control it and create jutsus etc.
I think it would be really nice to have something like this but I know it won't happen.

I don't think it mattered if you read the Manga. But in the Anime I thought the exact same thing as well.

 

[Umari Senju]

Most of what you wrote has actually already been covered in either the manga or filler episodes of the anime. The only one that hasn't really been answered in your list are the sannin as teens though they did cover a bit of Jiraiya's teen years at the frog mountain during his sage training.

 

[Dann]

Warning: Post will maybe have few spoilers for the anime viewers only, just saying.

If we had few more chapters after the end explaining and showing many things that the anime didn't, like the life of Jiraya and Tsunade and Orochimaru as teens, how exactly Obito ended up wearing a mask and having Madara's voice and in general more about Obito's life after he was saved by Madara to the point of his death, how the whole Akatsuki was created even from the first ideas of Obito, more about how people in Naruto world got ahold of chakra and managed to control it and create jutsus etc.
I think it would be really nice to have something like this but I know it won't happen.

I don't see Kishi writing a continuation....the only thing that will make sense is a Prequel. Starting Hagoromo and Hamura, or somewhere around that timeline, because Kaguya is a poorly written character and obviously rushed.

 

[Feelingless Shinobi]

I didn't watch many fillers from the anime in general and maybe I dont remember and sorry if the things I told have been already covered in these fillers, but what Dann said I think it can be really intresting.Anyway I think all of you got my point.
Kishi created a new world and it will be sad if we are left with holes in the whole plot, explaining a lot of things from the past would be more intresting than showing more about the future I guess.
Few cannon movies would be nice I guess, and could cover some things up.