Ancestral Property

My grandfather has 2 sons and 1 daughter. I am the son of daughter. My grandfather got ancestral property from his father. But due to some issues, the property went back to my great grandfather who is not alive now, due to a case on land from other party. My mom's father is trying to compromise the case on land and divide the property to his sons without considering my mom. My question is, Can we assign a case on the land as the land is on my Great grandfather name who is not alive now. The case should be like silent and without sending legal notice to my grandfather. Is it possible to assign case and without knowing that case has been registered and should ONLY be reflected when they proceed for registration of land. Thank you.