I think Theon and Sansa will look after her little brothers. She will find Rickon or very close to. Bran will find them if they will meet. Maybe she find Brienne first and she join them. They will run in to trouble on the way.
I think Ellaria has Arianne's role and Trystane Quentyns. I think it's the season Cersei dies (she hasn't yet in the books), but I can feel it.