I can def see onoki kicking it. hes mad old and hes finally changed his ways/philosoophy. but i think its still too early for tsunade / raikage. They have to come to terms with some things first. But you never know.
Ooniko's getting so much air time and speaking of creating change so I think he's going to die in this fight. Madara will most likely try to take him out first since he knows the most about MAdara's powers.