Let’s pretend this is an alternate Titanic ending.
Rose got into that lifeboat without jumping back on the Titanic, nor does she know Jack miraculously survived the sinking aswell. 10 years later, Rose is now a famous moving picture actress and she finds out a Titanic survivor has recently arrived in Santa Monica looking for her. She remembers with clarity that day on the Titanic where Jack promised he would one day bring her at the Santa Monica pier. Rose immediately runs to that pier, hoping to find that man who saved her in so many ways.. and there he is.