Actually Edo Hashirama said the chakra that Naruto and Edo Minato gave to the alliance was comparable to his own chakra volume. I think you're forgetting the fact that Yang Kurama was out or really low on chakra, Naruto (in KM) tried going BM and was kick out out KM because Kurama needed to gather more chakra but Yin Kurama gives Yang Kurama some of his chakra so the amount of chakra that Edo Hashirama compared to his own wouldn't be close to the full reserve of either Yin or Yang Kurama; its most likely less than half with of their chakra reserve since they wouldn't give away too much chakra since they'll need it to fight Juubito. Naruto trying to go BM-http://narutobase.net/manga/Naruto/642/7/ andYou must be registered for see links. Kurama telling Naruto to use his base for now as he tries recharging his chakra-http://narutobase.net/manga/Naruto/642/9/. Yang Kurama asking Yin Kurama for chakraYou must be registered for see links.
Naruto stands no chance at victory.
-Hashirama has more firepower than Naruto. (half of VoTe explosion>>Flash Bijuu Dama's explosion, half of that explosion is from Hashirama's attack)
-Hashirama already obliterated something more durable and much larger than his BSM Avatar. (Perfect Susanoo>Naruto's Avatar given the size, and the fact that Juubito's drop slam obliterated it)
-Hashirama can catch all of Naruto's Bijuu Dama.
-Shinsuusenju was in the explosion of 12 giant BD and it's own Chojo Kebutsu and it came out with it's main body intact, but all it's arms were destroyed.
Naruto's strongest attack is Flash Bijuu Dama. Hashirama's SS's 1000 hands would catch that and shove it right back in Naruto's face. Or it simply plows through using Chojo Kebutsu and creates a mini VoTE explosion but this time Hashirama comes out with most of SS's arms intact and Naruto comes out dead in a body bag.
It's possible, if naruto can sense the real hashirama amongst his clones, 1 good rasenshuriken would destroy him. Hashirama is nice but kyuubi has mad intel on him and naruto neg diffed the chakra draining dragon already. Not to mention the fact that naruto can go sm quicker than hashirama when using bm, he can stop hashirama before he gets a chance to use the buddha.
It's possible, if naruto can sense the real hashirama amongst his clones, 1 good rasenshuriken would destroy him. Hashirama is nice but kyuubi has mad intel on him and naruto neg diffed the chakra draining dragon already. Not to mention the fact that naruto can go sm quicker than hashirama when using bm, he can stop hashirama before he gets a chance to use the buddha.