Hi every one, ummn...i have been thinking of this since the last manga chapter, this is purely my opinion and it contains several facts u might not buy.
I just want to show the relation between Sage Mode and Sage Of Six Paths.
1. It is called Sage Mode i.e it is special mode that is synonymous to the SO6P, a mode that makes him special given the name.
2. It enables its yielder the ability to utilize natural energy and use it as a weapon.
3. Natural energy in a real sense can only be fully controlled by God. thus, in narutoverse SO6P control it.
4. Most of rinnegan based techniques are synonymous to the ability to control and manipulate natural energy/forces such as shinra-tensei, chubaku-tensei etc.
5.We've just seen that it is the only technique that could inflict harm to juubi jinchuruki.
6. Tobirama was surprised to see naruto using Toads mountain Sage Mode...maybe it was erased since before his time, and he probably knew it as a legend frm his ancestors.
7. And Finally Naruto used Sage Mode during his battle with kyuubi to control its powers, after kyuubi got hitted by that Sage Mode rasen-shirukken, kyuubi made this statement "This power...is this the six path?"<----meaning the power is as strong as that of the SO6P since kyuubi is one of the creatures who know the SO6P first hand.
so, IMO Naruto's power up is gonna be an improvement in his sage mode powers, he will probably figure out how to manipulate natural energy more...dont be surprise to see him doing more powerful technique like shinra-tensei
, and he also gotta learn how to use sage mode without staying still 
I just want to show the relation between Sage Mode and Sage Of Six Paths.
1. It is called Sage Mode i.e it is special mode that is synonymous to the SO6P, a mode that makes him special given the name.
2. It enables its yielder the ability to utilize natural energy and use it as a weapon.
3. Natural energy in a real sense can only be fully controlled by God. thus, in narutoverse SO6P control it.
4. Most of rinnegan based techniques are synonymous to the ability to control and manipulate natural energy/forces such as shinra-tensei, chubaku-tensei etc.
5.We've just seen that it is the only technique that could inflict harm to juubi jinchuruki.
6. Tobirama was surprised to see naruto using Toads mountain Sage Mode...maybe it was erased since before his time, and he probably knew it as a legend frm his ancestors.
7. And Finally Naruto used Sage Mode during his battle with kyuubi to control its powers, after kyuubi got hitted by that Sage Mode rasen-shirukken, kyuubi made this statement "This power...is this the six path?"<----meaning the power is as strong as that of the SO6P since kyuubi is one of the creatures who know the SO6P first hand.
so, IMO Naruto's power up is gonna be an improvement in his sage mode powers, he will probably figure out how to manipulate natural energy more...dont be surprise to see him doing more powerful technique like shinra-tensei