Is the father legally entitled to claim pre-emption for his brother's share of land that they own equally, and what is the ruling on the current situation of the son on this land?

The Shari'ah has given your father the right to file a pre-emption (shufa'ah) lawsuit regarding the land. This is a right established by the Shari'ah, whereby a first partner acquires what his co-partner sold to another. Scholars have defined pre-emption as: "A partner taking what his co-partner sold, at the price, compulsorily upon him." The court ruled in your father's favor, granting him what was rightfully his, and it has now reached you through a lawful means, which is inheritance.