That’s not how it works. The work is still protected by the original agreements. It would be like me selling you rights to something and then giving them away, so you bought nothing. What happened here is that now you, me or anyone else can make a comics with Fables characters, use their design and no one can sue you.
So if you want to draw the next comic with Bigby and Snow White, you can! And you can sell it and DC can go suck a dick.