Re: what's going on with Tsunade right now?? Does anybody knows?
Chances are pretty good she's gonna die. However:
we've seen guys: get their hearts blown out and live, get their heads cut off and live, chew explosives, come back as zombies, come back as puppets, turn into half toad half men, turn into half dragons, grow wings, pull bones out, control sand, hypnotize people by using their eyes, shed skin, turn into wood, have bugs come out of their skin, teleport, turn ink into animals, make a monkey turn into a stick, and many other "crazy" things in this anime.
ANYTHING CAN HAPPEN and no one should be shocked or upset if Tsunade lives through being cut in half...
we've also seen: Obito who was pretty worthless turn into Tobi, Naruto who was pretty worthless turn into Sage mode, Kyuubi using, tailed beast bomb having strongest in the village easily Naruto. We have seen Kakashi go from the guy who looked at Itachi and ended up in the hospital, to the guy who figured out Tobi's s/t crap and using like 5 or 6 Raikiris. Kabuto, go from a Jounin Level to a science experiment gone wrong, dragon sage mode beast. And Sasuke. Dont get me started on Sasuke.
So if SLUG SAGE MODE happens, don't be surprised by that either.