Ronan could take on a different minor role in Narnia, but it might be a waste of the Oscar-nominated actress. However, Susan is one of the main characters and someone fans want to see more of ...

there is one actress that comes to mind who is, unfortunately, too old for her ideal role. The ideal actor to appear in Greta Gerwig's Chronicles of Narnia is Saoirse Ronan as Susan Pevensie.