If that's the case, then why weren't Ino or Shino, two of the rookie who we saw taking part in exposing their enemy's weak points, shown? When Hinata is shown, we learn half of a page later Tsunade used the entirety of her chakra reserves to save the villagers. Couldn't Kishimoto have simply disregarded Hinata's appearance until she actually serves more of a relevancy to this arc? There was no point in introducing her as a survivor when the last time she was seen was when the infiltration of the village was actually taking place.
Honestly, I don't understand why everyone is freaking out about Hinata being shown in one panel. It's not like we are suddenly witnessing the rise of Naruhina before our eyes (though on the NaruHina fanclub site, there are probably people celebrating the "return of hinata"...lol). As a member of the Konoha 11, she is a semi-major character, so Kishimoto probably likes to show her once in a while. Besides, let's be honest: if there was a random panel of Kiba somewhere that didn't seem to have much relevance at the present time, no one (except for Kiba-haters) would be saying, "What the f*** is Kiba doing there?!"
You do have a fair point about what relevancy this has. I think instead of asking, "she's not relevant, so why is she there?" we should be asking, "she's there, so what relevance does this have?" It could be that Kishimoto wants to include all of the Konoha 11 in these chapters, because they will all have very important roles to play in the near future. Or perhaps it has something to do with what that other Uchiha guy mentioned, that Hiashi and Hanabi were away. It may be just an insignificant little detail that really has no point, but I have the sneaking suspicion that it is relevant in some way.
But my question in all of this is: Where is Sai?