Dick, Tim, and Jason had kids but were killed. Their kids lived with their grandfather Bruce. Bruce told their Uncle Damian to take them to Nada Parbat and train them, and when it is safe for them to come back to Gotham City, he will call Damian. Damian is very protective of them. Bruce will not let the Justice League or Young Justice near them. They is very loyal to their family. Them loves their grandfather. Damian loves his son and his brother's kids. Bruce called them back when Damian had his son.