Coach Ze is an amazing coach, I am sure he already has plans to beat China. Remember how he use the US libero to ruin USA on the final of the London Olympics?
China is definitely the team to beat. But Brazil is a much more experienced team overall.
I don't think USA will reach the final this time around. I think the gold medal match will be between BRA vs CHI. It is 2008 Olympic all over again, but now they are playing in Brazil.