You obviously didn't read the following post,
in which I already said they were just leasing them. Again, that's not the same as owning them. If Sony owned the film rights to Spider-Man, then they could sell them to anyone they chose. That's what owning something means. It belongs exclusively to you and no one else. Therefore, you can do whatever you want with it. Sony can't. If they were to decide to sell the film rights to Spider-Man, they would HAVE to sell them back to Marvel. If I own a house, I'm under no obligation to sell it to one and only one particular buyer. Sony does bear that obligation to Marvel. Therefore, they do not OWN the film rights to Spider-Man.