Warning: SPOILERS for Excalibur #9
Marvel's Captain Britain Corps has officially been replaced. For the last few years, the United Kingdom has been struggling to figure out its place in the world. The seemingly endless debate about Brexit has seriously damaged the country's reputation, to the extent that - in the comics, at least - even Doctor Doom has mocked Brexit.
Marvel's Excalibur series is, in part, an exploration of the conflict that runs through British society right now. The most potent symbol of this is Betsy Braddock, formerly the psychic called Psylocke, who has been transformed into the new Captain Britain. That technically makes her part of the interdimensional Captain Britain Corps, but it's been unclear how the Corps feel about this. At least until Excalibur #9, in which readers learn the Captain Britain Corps no longer exists.
In Excalibur #9, Apocalypse sends a group of X-Men to the Starlight Citadel, former home of the Captain Britain Corps. It is now the central fortress of the Omniversal Majestrix Opal Luna Saturnyne; although her purposes are unclear, she has assembled a new legion who serve her. The Priestesses of the Starlight Citadel are sworn to act as agents of balance and protectors of the realm. Every Priestess is crowned with the Moonlight Diadem, allowing them to travel across the Multiverse; they are armed with the Crescent Bow, which allows them to project moonlight itself as a devastating weapon. "Those who fight you will be limited by the bonds of reality," Saturnyne teaches them. "These chains dissolve in the Moon's white light."
Saturnyne has always been secretive, but her comments suggest she believes events in Otherworld - Morgana Le Fey's uprising, and Otherworld's conquest by Jamie Braddock - to be a corruption, a stain on the Multiverse itself. She is aware Apocalypse is the Machiavellian mind behind these events and is determined to resist him. In Excalibur #9, Apocalypse reveals his goal is the unification of the mutant nation of Krakoa with its long-lost "lover," Arakko; he is destined to succeed in his goal, as revealed in X-Men #2, but clearly Saturnyne will fight him every step of the way.
It's interesting to note that Saturnyne decided not to rebuild the Captain Britain Corps. Instead, she has created a new group, who are almost cult-like in their devotion to her; she seeks unflinching obedience, and she wants her Priestesses to be loyal enough to sacrifice themselves on her behalf. The Captain Britain Corps were clearly far too individualistic for Saturnyne's tastes - and hence have been replaced.
Excalibur #9 is on sale now from Marvel Comics.