As much as it's most likely true that she will die healing the other kage, it's kind of sad when there is no real chapter about it.
I mentioned it before, it's tiring how every other character became unimportant, even people who were always very important like the kages.
If they die or if only one of them dies, it needs some boss chapter. Seriously, they deserve it but the way things look like at the moment, we will see alot of juubi and Naruto and Madara episodes.
I feel sorry for all the fans of other characters. I can understand how that is driving you nuts, Slug Princess, and I hope you will get answers soon. At least our Tsunade deserves a boss ending and not some lame one phrase explanation from Madara and story over.
It's also a bit unrealistic to show someone (main character) dying, then not talk about it anymore for a full year of chapters.