Last panel shows Naruto making a Kagebunshin sign, but the speech bubbles pointed to the ground. We did not see the Sage mode Naruto clone, and I don't believe it popped. I think it dived underground and multiplied... Moreover, when Kurama sits down to gather chakra, he uses the same hand signs that Naruto uses to gather Sage chakra, so Kurama must be gathering natural energy.
My theory is that the next chapter will show a bunch of Naruto clones popping from underground with combined 9T/sage mode - can't wait!