I think with Percy Jackson it was a matter of finding the right cast to fit into these roles , sort of the perfect cast for these roles , because hopefully , God willing , we will go on to do other Percy Jackson films and you want the cast to grow with their characters . '' `` I think with Percy Jackson it was a matter of finding the right cast to fit into these roles , sort of the perfect cast for these roles , because hopefully , God willing , we will go on to do other Percy Jackson films and you want the cast to grow with their characters . ''