Though the deal was subsequently rejected, we know the price of granting an extension on the Daredevil licensing agreement was Galactus and the Silver Surfer. And we recently found out that the price of altering (ALTERING!) the powers of NTAW was Ego. He ain't exactly an A-Lister, but Ego is certainly a significant part of the Marvel mythos.
So what was the price for handing over X-Men TV rights? It certainly wasn't money. In the two prior dealings with FOX Marvel could have but didn't ask for a check. Was it a piece of the action, a minority stake in FOX's TV outings? That could be part of it. But have you checked out the trailer for Legion? It looks interesting, but I highly doubt we are looking at a mainstream hit here. This ain't exactly GOT. And as I've stated before, Marvel could have put out a show about a mentally disturbed Mutant - I mean Inhuman - with vast powers and not given FOX a dime. The same goes for the "Mutant on the Run" show FOX has in development.
For one thing Inhumans aren't mutants. Also for another, Marvel and ABC are still putting out an Inhumans TV series. So they are still doing that.
I imagine this deal is mutually beneficial for all. Here's why. As of now, all of Marvel's TV shows, except where it comes to the animated ones on Disney XD, are supposed to be a part of the greater Marvel Universe. Despite the separation, everything is said to be in the same continuity.
So what does that mean? Marvel and Disney don't want to start a whole brand-new line of X-Men live-action TV shows that would conflict with their already established TV shows. Marvel likely benefits financially from this deal, and Fox gets to expand their X-Men franchise to TV.
Also, live action TV may have been a grey area in the previous deal. I never saw the contracts for the film rights, but it might've been a legally grey area that prevented Marvel from doing anything live-action with mutants or X-Men on TV all those years.
Keep in mind, that a lot of current TV deals for IP now include both film and TV. Legendary just acquired the rights for Dune, and those rights include both film and TV for the book.
Since we don't know the terms or contracts at all, one could potentially assume that the new deal simply clarifies that Fox also control over the mutants and X-Men in live-action TV as well, while Marvel also still gets a cut of the deal and gets put in as a co-producer.
The only conclusion I can come to is that the price was a) Marvel characters that are b) bigger than Ego or the Galactus/Surfer combo asked for back in 2012. That leaves the entire FF character family.
If one of the self appointed experts on these boards can come to a more logical conclusion I would love to hear it.
I just did. The logical conclusion is that there were legal boundaries for Marvel to control X-Men and mutant IP on live-action TV. Case in point, the Mutant X lawsuit. Yes lo and behold, the long lost Mutant X TV series. 20th Century Fox sued Marvel over this show. The lawsuit was eventually settled. 20th Century Fox claimed Mutant X was a copyright violation of X-Men.
http://articles.latimes.com/2003/mar/05/business/fi-mutant5
http://mutantxarchive.livejournal.com/130381.html
So think about this. In 2001, Fox SUED Marvel because Marvel had a live-action TV series called Mutant X.
So Marvel was more than likely handcuffed. They can't do their own TV show using mutants or the word mutants. Even though its TV, Fox will still try to claim some sort of ownership.
Again this way, Fox gets to expand their franchise, and the terms of Marvel TV/Fox TV and X-Men are more broadly defined. And Marvel also gets financial renumeration for the deal.