It seemed like Thanos’ story might’ve ended with Avengers: Endgame. Yet, comic fans know that the Mad Titan has some interesting connections to another race of aliens. He was the son of two Eternals, A’lars and Sui-San. Yet, he was born with the Deviants gene, which is why Thanos had his purple complexion. It was uncertain if he would still hold that connection in the Marvel Cinematic Universe, especially now that Eternals will release next year. Well, The Direct had a chance to visit the interactive exhibit Avengers S.T.A.T.I.O.N. where they showcase props and information on the franchise. It seems they added something on the infamous titan that may finally confirm his lineage.
Thanos’ origin is said to be on Saturn’s largest moon, Titan, making him a Titanian in nature. It is rumored however that Thanos is the last of an ancient and highly sophisticated species known throughout the universe as ‘The Eternals’.
I do believe that there is a reason they say it is “rumored” as some may still be on Earth. Sersi is a prime candidate who might have chosen to stay among humans. We don’t know if the Eternals lived on Titan at one point, so it’ll be interesting to see if that gets explored in the upcoming film. Thor seems to be the source of this information. It looks like the Asgardians are aware of the Eternals’ existence, which may also hint at a connection if you consider the Norse Gods’ long lives.
Source: The Direct