After the housing reform, it did not say that you have the right to continue renting. No matter how long you lived before, the property right of the house was owned by the unit at that time.
If your parents buy a housing reform, you and your brother are both heirs, and the housing reform can be inherited as an inheritance. Your brother's housing reform has nothing to do with you Whether your father's interest-bearing rental money will offset the house payment during the housing reform, you can share the money, but only if your parents agree to give it to your brother.
The limitation period of prosecution is within two years that you know or should know, which needs to be defined by the court, but I personally think that your prosecution will not have a good result. It can only hurt the feelings of brothers. I am very serious and responsible to answer, I hope you can understand.