I think this chapter re-established Shikamaru's position in Naruto's world. He summed it up in simple phrase: IF Naruto ever becomes a hokage, he would need someone reliable enough to be on his side. To this point, it is either Shikamaru, Sakura or Kakashi.
Kishi has this pattern for at least two of the hokages: Hashirama+Tobirama and Tsunade+Shizune. The assistant serves as a counter balance to their respective hokage. It's not surprising if Naruto would have someone to aid him throughout his journey as hokage (if he survived this war). Initially I thought it would be Sasuke, but ever since he consciously decided to join Orochimaru, it's a gone case. I cant recall which chapter the flashback about Shikamaru wanted to walk besides Naruto --but now since we have it shown, it all makes sense... suddenly we could relate and connect the dots backward.
I'm more than happy to see Sakura again. She's so pretty and fierce. Yet, at the same time always worried about Naruto. You can see that she's very delighted Tsunade praised her. I could imagine that Tsunade is a very tough and difficult teacher to deal with, and Sakura is that underdog girls (with no special ability or bloodline limit) trying to proof herself.
This chapter also displays obvious contrast between Sakura and Hinata. When I checked back the chapters in which they are displayed together in a chapter, it seems that it always made to show the contrast and differences.
Here, we have Sakura that worried about Naruto overdoing himself and was very happy that Naruto helped her saved Shikamaru. She even told Shikamaru that she wont let him die because "Naruto..no everyone still needs you...". Implicitly doing this for Naruto's sake, as her initial thoughts. (If anyone could translate the raw, I'm curious if this was really the case). Kishi could write that by omitting Naruto, but he choose not to. For Sakura, whether she (or we, as readers) realized it or not, she almost always unconsciously put Naruto first. For Sakura, it's almost always for Naruto's sake.
On the other hand, we have Hinata which always think to do her best to be on Naruto's side. The subtle difference between Sakura and Hinata is the receiving end of their resolution.
Sakura -> almost all the things revolved around Naruto is for Naruto's sake. It's for his goodness.
Hinata -> almost all the things revolved around Naruto is for Hinata's sake. It's for her to be with him. Please don't get me wrong, I don't dislike her character at all, but this is fact.
Was Hinata's statement romantic? Well, it depends on how you see it. We're talking about Hinata here. Everything that comes from her towards Naruto is almost always in romantic lights. But, that's hardly a news isn't it? So, why would we always have this "to be on Naruto's side" statement reinstated again since few chapters ago? Frankly, it's reiterated too much that it becomes nothing special to ponder upon. If it is her resolve to do her best to be on Naruto's side in romantic light, why do you need to do so? What's her definition to "do her best"? Some more, if you put that sentence in the context of the facial expression she wears in this chapter, you'll see that it *may* not be "standing by his side" in romantic light. For fellow women around here, let's ask ourselves, have we ever put such fierce expression to "do our best" to win the love of our live? I highly doubt so. If we ever think about doing our best for that purpose, we'll wear a soft smile instead.
So, I personally don't think her resolution to "stand by his side" is to become Naruto's love interest. We'll see further in the future. But at least, this chapter has given me enough comfort that it was not the case. Remember, it takes two for a relationship to work. You got to factor in Naruto's feeling in the equation. And so far, his feeling for Sakura is unwavering (chapter 631 approves this).