This thread may have Spoilers so leave if you don't want to read 
What the people says :
Hamura = Sasuke
Hagoromo = Naruto
I have thought about that and I think that is not possible! Because how can be Hamura = Sasuke when Hamura doesn't have rinnegan?
My theory :
We all know that :
Kaguya = Hagoromo + Hamura ( Mangafact )
Hagoromo = Uchiha + Senju ( Mangafact )
Hamura = Hyuga ( Mangafact ) + Uzumaki ( my opinion and because the Uzumaki doesn't have another way )
The new powerup will be by :
1. Eating the fruit from the tree that has all the chakra.
2. Or Hamura giving a new power to Sasuke and Naruto.
My opinion :Sasuke = Hagoromo { because they have the rinnegan and Sasuke is from the Uchiha ( Hagoromo = Uchiha + Senju ) }
Naruto = Hamura { because they have the body and Naruto is from the Uzumaki ( Hamura = Hyuga + Uzumaki ) }
The next power up :
Sasuke will have both rinnegan and Sasuke will get the Senjutsu ( body ) like Hagoromo.
Naruto will have full body power and Naruto will get the BYAKUGAN ( eyes ) like Hamura.
AND when you say Naruto will get the RINNEGAN I will disagree with you because Hamura doesn't have the rinnegan , and when you say Hagoromo = Naruto I will also disaggre with you because Hamura is not Sasuke and this is impossible sasuke to get the Byakugan !
In the End both will have the eyes + the body . Like Hamura and Hagoromo and so they will be able to defeat Kaguya !
What do you think ?
Sorry for my bad english.
And this is just a theory maybe kishi will make that not happen !
What the people says :
Hamura = Sasuke
Hagoromo = Naruto
I have thought about that and I think that is not possible! Because how can be Hamura = Sasuke when Hamura doesn't have rinnegan?
My theory :
We all know that :
Kaguya = Hagoromo + Hamura ( Mangafact )
Hagoromo = Uchiha + Senju ( Mangafact )
Hamura = Hyuga ( Mangafact ) + Uzumaki ( my opinion and because the Uzumaki doesn't have another way )
The new powerup will be by :
1. Eating the fruit from the tree that has all the chakra.
2. Or Hamura giving a new power to Sasuke and Naruto.
My opinion :Sasuke = Hagoromo { because they have the rinnegan and Sasuke is from the Uchiha ( Hagoromo = Uchiha + Senju ) }
Naruto = Hamura { because they have the body and Naruto is from the Uzumaki ( Hamura = Hyuga + Uzumaki ) }
The next power up :
Sasuke will have both rinnegan and Sasuke will get the Senjutsu ( body ) like Hagoromo.
Naruto will have full body power and Naruto will get the BYAKUGAN ( eyes ) like Hamura.
AND when you say Naruto will get the RINNEGAN I will disagree with you because Hamura doesn't have the rinnegan , and when you say Hagoromo = Naruto I will also disaggre with you because Hamura is not Sasuke and this is impossible sasuke to get the Byakugan !
In the End both will have the eyes + the body . Like Hamura and Hagoromo and so they will be able to defeat Kaguya !
What do you think ?
Sorry for my bad english.
And this is just a theory maybe kishi will make that not happen !