I could be totally wrong about this, but I agree. I just don't get the appeal.
Look with Guardians, even I got the appeal of that. I read DnA's comic run, and I thought those were great building blocks for what became the Guardians of the Galaxy film franchise. With Guardians, it was a space opera. So it was like Marvel could do their own Star Wars sort of thing but with fun Marvel characters. I believed in the potential fo Rocket Raccoon and Groot becoming characters the audience could fall in love with. They are like R2D2 and C3PO. They are iconic.
Eternals, I just don't see what the angle is and why these characters are so special. Especially, when you for all intents and purposes have X-Men, Fantastic Four, and Silver Surfer to play around with in the future. I know you'll need other properties, but Eternals sounds so uninspiring. It just seems like another version of Inhuman. Inhumans I think had more potential as a movie anyway, except then it got sent down to TV and basically gutted and taken out like trash.