Team 7 will win with high difficulty.
If we look at both teams, i don't se sakura being much of a problem for the Wood Bro's
So it's kinda like a 2 vs 2 fight.
Yamato will die, but atleast probably injure one of them (not a bad wound) Hashirama fighting both Sasuke and Naruto would be incredible tough, he uses Wood Release, though he probably also used earth and water since he could use Wood. He is extremely skilled as shown, since he defeated Madara and Kurama (with help from his wife to supress the kyuubi).
So i see these people die: Yamato, Sakura.
Naruto and Sasuke will both be greatly wounded, but will both be lucky to come out alive, while the Legendary 1st Hokage will fall into the dust.