The comics are from the 70s, with additional runs in the 80s and then a few revivals (including one by Neil Gaiman) starting in the late 2000s.
In the comics, Mentor (the father of Starfox and Thanos), is a second generation Eternal, and the Celestials (briefly seen in the Guardians of the Galaxy film) are tied to the Eternals (essentially, the Eternals are experiments of the Celestials in the same way the Inhumans were experiments of the Kree (and the Kree were also experiments of the Celestials).
This teaser trailer, IMO, is pretty tepid, there's no character beats to grab onto, and so there is no real tease about things that the viewer might like, like an interesting character or story point. There seems to be an emphasis on possibly a romance, but even that is so under represented that I'm not 100% sure that's the case. It is just a teaser, so maybe a full trailer will make me feel more interested.