Cufanai

So, I knew most of this(and some of the changes that have happened since the article was written), but I still have a question.

The Long Version: There's Marvel's Marvel Cinematic Universe(note the capital letters)--the MCU. And then, if Fox ever crosses over Fantastic Four with Xmen(or perhaps even if they don't, with the Xmen movies, Wolverine movies, and now, I hear, an X-force movie), there's Fox's Marvel Movie Universe(again, note the capitals)--the MMU. But what all exactly does Sony own the rights to? If they wanted to create their own (let's call it the) Marvel Cinematic Continuity--the MCC-- with separate movies/series for, say, Spiderman, Black Cat, Venom, Silver Sable, Paladin, Cloak and Dagger, Madame Webb, Moon Knight, and possibly other Spiderman supporting characters, could they do it, considering, for examples, Silver Sable's connection to both Spiderman(and consequently the MCC) as well as the MMU(through her relationship with Doctor Doom), or Cloak and Dagger starting as Spiderman supporting characters(MCC) but over time, becoming attached to Dr. Strange(MCU) and mutants(MMU), etc. culminating in a team up movie(called "Slingers", maybe, or "Spiderwebs"?), do they have the rights to do this?

In a nutshell: Seemingly obviously the rights to Black Cat, Venom, and Madame Webb fall under Sony's Spiderman rights umbrella, but does that umbrella also cover characters who started out as or became the most well-known as Spider-man supporting characters but also have somewhat major connections to Fox and/or Marvel Studios characters?