My question involves bankruptcy in the state of: CA

I am 2 years into a Ch 13 bankruptcy. I am getting married this year and would like to know what my fiancée and I can do to protect his income and savings; he is also a small business owner. Will a prenuptial agreement protect his assets from the bankruptcy court and creditors? We live in CA, which is a community property state. Does this mean that because our joint income would increase, I need to refile and potentially pay more to the trustee? Any advice would be greatly appreciated. Also, is this a matter for a bankruptcy lawyer or family law?