I don't know why people suspect Sakura will die, she is going to stick around to the end. As for the current fight with Naruto, Sasuke, and the 4 edo kages against Obito, well things are escalating, right now not much Sakura nor anyone else can really help fight. If anyone else besides the 6 against Obito could do anything, it would have to be Bee but he is just standing back with the rest of the alliance, poor kakashi is missing out on seeing Minato too. Sakura's role is not done, I mean long as team 7 has a story, we have more to follow, but for the current fight, all i can suspect is when the current 5 kage come, more will be able to be done. Sakura and Tsunade would have something in common for the fight against obito but if its really just healing again, not really going to argue there, I mean as the fight against Obito escalates and if its is just a mob consisting of Naruto, Sasuke, Minato, Tobirama, Hiruzen, Ay, Mei, Ohnoki, and Gaara (Possibly Hashirama if he gets away from Madara or if Madara screws up somehow with his own plan) then think of it like one of those super bosses in many rpgs or a raid in wow, all the fighters up front, healers in the back constantly restoring everyone, if Sakura and Tsunade are at this, well no arguing there I mean the world depends on the outcome of this fight. I would want to see Sakura throw more punches but it really depends how this fight goes but if its the fate of the world, she can best help by keeping the others fighting alive, besides the remote healing technique is a good skill, one that can stay active while others fight. But in any other case, maybe Sakura will at least nail Sasuke once near the end, that would be a nice scene to see her catch him off and send him flying, dont think it may happen but if it did, nice.
The most likely situation though is, I am starting to see this as what Aizen did in bleach near the end of the fake kurakura town arc, he was just superpowered and had basically the will to say anything that happened to him didn't happen. Well Obito is like Aizen just going to steam roll some people, luckly this time the allaince is staying back and the fodder troops can watch and be safe. Unlike the fodder troops we will see flatend tomarrow in the anime when Madara calls down that metor on them. But yeah one of these 2 things will happen to stop obito since the "he loses control" aspect was overcome.
1. Madara's secret weapon turns out to be his weakness, as this is madara and he was always prepped, dont be surprised if its something to stop Obito, if its basically an anti-god breaking jutsu, hey something has to prevent Madara from failing like he did in the rinne tensei.
2. Naruto's former plan of extracting the tailed beasts can somehow still work, if they find a flaw in Obito's power, if there is something they know that he does not, then they could turn the tide.
But as long as there is one thing to "break" Obito's power rush in the future, something will bring him down. Hopefully not like in Bleach where Aizen only got beaten because he was caught off guard, and at one moment they turned his power against him to seal him in himself. Technically Aizen was not beaten, he was sealed and suppressed. This makes it exciting for our heroes in Naruto, just how can they stop Obito now? And Madara? Well we will see. Kinda funny how last volume was a bolster to Sakura, in the first half of vol 66, now this volume is about Obito's power rush and him just going "Come at me bros, afraid kishi broke me?"