Throne of Glass Sarah J. Maas (After Empire of the Storms)-Aftermath

What happens to Aelin after she is locked away in the iron coffin wrapped in mounds of chains by Maeve? What is Rowan's reaction to her sacrifice? Will he find her? Will the prince, or king, rescue his mate, his wife, his princess, and his queen in time? Will she be saved from the darkness and pain claiming Aelin of the Wildfire? Will the light of the savior of the world go out? Will she make out of this alive? Or will the Dark Empress destroy her from the inside and break her?