Sanctuary City Prevention Act of 2010 - Prohibits the Attorney General from expending funds in any lawsuit that seeks to invalidate those provisions of the Arizona Revised Statutes that were amended by Arizona Senate Bill 1070, as amended by Arizona House Bill 2162, until the Attorney General reports to Congress with a plan to enforce the immigration laws in any state or subdivision that has in effect any law, policy, or procedure contravening specified provisions of the Illegal Immigrant Reform and Immigrant Responsibility Act of 1996 that prohibit federal, state, or local government entities or officials, or persons or agencies from restricting certain immigration status-related communications with immigration or law enforcement personnel.