MINATO WONT DIE SO EARLY AND THOUGHHE WILL RELEASE HALF OF narutos bijuus chakara to naruto
and with the help of full kurama power and he will along with little chakara of other beast and he may ask some chakara with gara (since he was one tail jinchuri and may had little its chakara) and 8 tails .then
finally trasnformed into partial ten tails like obitos ten tails(has less chakara from 9 and 8 tails)
and i dont think kages willl fight with obito
they will go to help first and against madara because the promissed to naruto
and hashirama cant win against madara( who has hashirama cells, rinnegan , MS) who has copied all techinque of hashi during last fight..