The Celestials are known as a powerful race of aliens who played a huge role in key events in human history.
“We will see the Celestials in their full, true, enormous power in Eternals, yes,” Feige said.“Deviants are in the film.
The Deviants in the comic book mythology were…extremely important plans of the Celestials…and we will see Deviants that look unlike anything we’ve seen in the comics.
That series introduced a group of immortals called the Eternals and their rivals, the Deviants.