I dunno, but I feel bad for whoever they fight. Plus, Kishi would have to explain Edo Tensai a little better. Four of the five listed are sealed (all in the same jutsu at that). On the other hand, they could each just release themselves/each other from the jutsu and go kick the crap out of whoever resurrected them.
You could also add Tsunade to the list. I'm pretty sure she's dead by now. She was cut in half three or four weeks ago and has probably died by now.