Marvel's Multiverse Saga reaches its climax in "Avengers: Secret Wars" in 2026.
Harry Styles and Kit Harington join the MCU as key characters in "Eternals."
Kit Harington's character, Dane Whitman, transforms into the Black Knight through the cursed Ebony Blade.
Black Knight's role in Phase Four films remains a mystery but could appear in Phase Five and Six.
In Marvel Comics, Black Knight plays a vital role in defeating Kang the Conqueror.
It's uncertain if MCU will follow this comic storyline in "Secret Wars."
The future of Phase Five is still being developed, so Black Knight's involvement in "Secret Wars" is uncertain.