The third season of Re:Zero kara Hajimeru Isekai Seikatsu. 

A year has passed since Subaru’s victory at the Sanctuary. He savors a life of fulfillment while Emilia’s camp stands united for the royal selection—until a fateful letter arrives. Anastasia, a royal selection candidate, has invited Emilia to the Watergate City of Priestella. But as the party begins its journey, crisis stirs beneath the surface and Subaru meets a cruel fate once again. 
(Source: Crunchyroll) 

Notes: 
The first episode has an extended runtime of ~90 minutes, and received an early premiere at Anime Expo on July 5, 2024.