A. Don't worry about the police action. You are the just witness in your uncle will. If your uncle is competent and mentally fit to execute a will that no one question about it.
B. As you said, you are expecting criminal cases against yourself under the section 120 B for criminal conspiracy, but it is not easy to establish because of the testator must give his statement in respect of there was no undue influence, mislead, fraud at the time of execution of will and no role of any other persons.
C. In case, if complaint registered, you should have applied for anticipatory bail, but till now no complaint has registered against.