When it comes to Sakura's actions, she could cry next chapter or so and have the biggest growth towards naruto but fans will still label a serious moment like this as "mutual friendship" despite even if sakura cried her whole heart out for naruto to not die. Even during the comeback moment with naruto standing up, her tears of joy will just be labeled as "content he is alright and that her friend is going to make it" really thats all they would call it.
Yet Hinata running to naruto in concern is obviously a display of real love even if Sakura has some kind of memory or self focus on herself thinking about how important naruto is to her, this would be completely disregarded by some just for hinata's static trait.
On the topic of what will happen with Gaara, Naruto, and Sakura, its really what happens to where they go.
-On the one hand its possible it may be Minato, it could be, but doing so would leave kakashi alone but kakashi has Obito resisting so if Obito manages to actually destroy the left rinnegan, it could be done so it would deny madara his full power. Its not hard to imagine what kakashi could do alone though, he has pulled through many times, he managed to defeat obito in the kamui dimension despite having been trashed by pains bodies. But on this speculation of it being Minato giving naruto dark kurama, this creates a special situation where if one who has a strong stamina after tailed beast extraction were to get a good porition of their removed tailed beasts chakra back, could it possibily act as a countermeasure to halt the extraction toll? Kurama is technically the only tailed beast in effect, split up due to what Minato did on him with the reaper death seal. So really we can say Madara has 8.5 tailed beasts, not all 9. I mean the ten tails can still activiate but its hard to see how the final remaining half of all the tailed beasts will become the comeback to stop madara when he could essentially pull the same thing on Naruto right away, unless he teams up with sasuke and whatever he gets in his comeback, I dont know.
-If things go naruto gets dark kurama, when sasuke is revived, I only see their team work again with sasuke's hashirama jutsu still lurking around as the means to be the start of stopping madara.
-The fruit on the tree though, technically the empty husk of the ten tails is still present (the flower Obito created not the gedo statue) its still present and when the extraction of obito occured, the whole allaince jumped to stop madara. If its true, Kurama may have told gaara about the fruit. If the fruit of the shinju is powerful, it may be able to save naruto but then wouldn't that put naruto in god mode? Not sure.
I think the biggest mystery for us NS fans right now is what Sakura does next or how she reacts more beyond that last page the other mystery is yes what did kurama tell gaara to do? It was at least smart of gaara to take Sakura with him to impede narutos slow death but her role may go further than trying to keep him alive, I mean like yes a developmental moment or some action needed like if in the minato situation if Minato needed her for a transfer to naruto or something else.