The Daredevil rights should revert back to Marvel pretty soon if Fox doesn't make use of them.
Either that, or the resolution of the Kirby Estate v. Marvel/Disney "lawsuit".
What do I mean? I believe it is all part of the pretty devious plan Disney came up with when they announced they were acquiring Marvel over a year ago. They wanted it all and even said so. Yet how could they get it all if Fox and Sony had the rights to the biggest draws of Marvel's inventory of characters? This is what led to the Kirby Estate announcing their lawsuit about a week or so after Disney announced they were buying Marvel, and their "claim" on Spider-Man in particular. Disney enlisted the Kirby's in a little bit of legal theater.
You see, all the contracts that Marvel has signed over the years would be nullified and need renegotiation if there were now another party named to be equal owners of the properties in question. So if the Kirby's win, the contracts with Sony and Fox become worthless.
So all Disney/Marvel has to do is to capitulate to the Kirby's demands on the day the trial opens. They can't lose. They would still own a 50% share of the copyrights and all of the trademarks, so they could continue to publish all they want. But a couple of weeks after the trial, after all the contracts with Fox and Sony have been shredded, Disney will announce a deal with the Kirby's to buy their rights in perpetuity for a small nine figure sum. A deal that has actually already been made. A deal that was in place before Disney ever announced it was buying Marvel.
At least, that is how I see it. It all just reeks of a devious plot with underlying motives, a typical corporate move. And it would be funny if the only losers in the Kirby/Marvel lawsuit were Sony and Fox.