Regardless, thanks to this deal, Guardians of the Galaxy Vol. 2 will use Ego (played by Kurt Russell) as Peter Quill’s father and one of the biggest cosmic characters introduced to the MCU yet.
As for Ego the Living Planet, having to strike a deal regarding him is also unusual.
Personally, I think Marvel scored the better half of the deal, but opinions will differ.
It’s possible that Ego’s numerous conflicts with Galactus in the comics meant that he was close enough to being a “Fantastic Four character.”