Well I thought that XD The thing is that I don't know Sasuke's current mastery over sage chakra to make some more educated guesses.
Impossible at this rate. Chapter 462 speaks by itself... only the Ashura's Successors have the body to hold high amount of chakra to awake Sage Mode (high amounts of chakra are needed to awake sage mode).
I give you the fact that Sasuke has tremendous eye powers, and that he has great spiritual energy, enabling him to concentrate devastating jutsus with little amount of his powerful chakra.
But powerful chakra doesn't mean lot of chakra. It only means powerful nonetheless.
The one who posses high amounts of chakra here is Naruto, chapter 17 is the proof.
Last chapter also proved that when Sasuke uses external sources of chakra (the bijuu) he is not match against Naruto's Senjutsu chakra, meaning that Sasuke doesn't have spiritual energy left to knead powerful chakra.
If Sasuke really were able to earn the title of "mastery over sage chakra", he should be able to awake Sage Mode. But last chapter proved that he didn't use Senjutsu Chakra, he could not handle that quantity of chakra for this purpose, as Naruto could.
So... I guess Sasuke is practically FCKED right now, aside of his chidori, his last resort.