You have not informed whether the property in question is self acquired property of your Father or otherwise. In case, the property is your Father's self acquired property, he can do whatever he wants to do with the peroperty and Will it to anybody he wishes to and he need not as much as inform anybody leave alone discussion.
However, if you suspect the veracity of the Will as to the mental condition of your Father as it was made just two monhts before his death, or you suspect that your Father's signature was forged, you can file a case accordingly questioning the validity of the Will with all proof to support your allegations. Merely saying that your Brother managed to get his name alone to be inserted into your Father's will not help you in Court. You have to go to Court with all proof.