I imagined Richard Rider AKA Nova Prime as part of the MCU. For this concept, Corpsman Rider is imbued with the Power Cosmic of an unborn Celestial that was growing in the core of Xandar. Following the planet's destruction by an enemy force (Annihilus ?) the energy of the acorporial Celestial needs a host, and bonds with Richard, the closest Nova it could find.

Because of the nature of Richard's new status, his design shares elements with the Eternals costumes, while keeping the essence of the Nova Corps uniform.

What do you guys think ? I've been thinking about it since I saw the Eternals movie, and I know it won't happen so this is just for fun :).