Originally Posted by comics
Is it known that Galactus and Silver Surfer are part of FF as a whole, that for Marvel to get both it has to buy the entire FF franchise? Or are they separate properties?
My understanding is that they (along with Dr. Doom and presumably characters like Mad Thinker, Moleman, Puppet-Master etc.) are controlled by Fox as a part of their FF rights.
But the agreement can be re-written in any way that both parties agress to. If, for example, Marvel offered $40 million for Galactus alone and said: "You can keep Silver Surfer." They could rewrite the contract.
Any contract can be changed and renegotiated. It's just a matter of both parties agreeing on the terms.