I kind of got that same vibe from the first Eternals film. I would not be surprised if they just made Galactus a celestial himself like they did with Ego. Whether he will cap out the end of an entire saga is still very much up in the air though.

That’d be interesting maybe even have eternals fight off Galactus’ heralds

That would be a cool idea

I think Galactus would be a cool villain choice

However they will have to get rescued from Arishem

I don’t know if I would use the term cosmic saga, maybe "Ultimate Saga"!

It’s possible. Maybe the Fantastic 4 will be involved as well.