Something Amyss said:
Hasn't this rumour been around a few times before now?
It's been floated for ages that there were behind the scenes discussions. It popped up around the same time Fox started to realize what a looming disaster they had with Josh Trank. In spite of what they say openly, I'm giving it strong credence. The key thing that elevates it above rumor is we have now seen official confirmed evidence that Fox is openly working on the other half of this rumor. The Hellfire and Legion TV series. There is no way Fox got the TV rights without giving Marvel something. And there are only 2 things Fox has that Marvel wants. The FF, and a renegotiation of X-Men merchandising deals, similar to what Sony agreed to. Of the two the FF is below worthless to Fox. It cost them millions. Whereas the X-Men merchandising has had a Marvel problem. While Fox gets a substantial cut of the merchandising under the existing deal, Marvel maintains an absolute veto on any and all merchandise deals and products. Which they have been exercising ever since the Fox movie President told them to "fuck off" when they sought to negotiate for the return of the FF cosmic characters for use in Guardians of the Galaxy movies.
So right now Fox wants TV rights to their portable movie franchise. They have another movie franchise that just cost them tens of millions, and a merchandising deal that earns them nothing because they pissed off the partner. Marvel wants the FF back, particularly for the above mentioned Cosmic Characters. Galactose, Silver Surfer, Annihilus, Blastar, Terrax, Psycho Man, Skrulls, etc. all things that also play heavily into Guardians and such. If Fox trades back the worthless cursed property that is the FF they get their TV shows, plus they get enough Marvel goodwill to uncork the X-Men movie merchandising and let them make some profit on the back end.
One other huge thing changed from when this was first rumored. Disney's Bob Iger stepped in to elevate Kevin Feige, and step on Marvel's President. Ex Toymaker Ike Perlmutter. Perlmutter has long been a major piece of the bad blood between Marvel and Fox. Right now I suspect there is an agreement to a deal between Disney and Fox. Disney is likely still working through the internal politics of ramming it down Perlmutters throat while publicly smiling. Gut instinct tells me Perlmutter will not be with Marvel one minute longer than is called for in his contracts with Disney from when they bought the place. He brings them no value and is way out of his league.