Announcement from Sony Pictures, hot off the presses.
This isn't entirely surprising to me. I was just reading the other day that Sony had already scheduled a fourth Spidey movie for release in 2016 and that they had plans to expand the universe on film. Venom's a no-brainer from a marketing standpoint, and I'll bet that he'll be the focus of that fourth movie (perhaps with TASM3 leading into it?).
But what really interests me is the Sinister Six. It'll be a nice change of pace to see a comic book film that focuses on the villains. And IMO Spider-Man has one of the best rogues galleries in comics (maybe second only to Batman's), so I don't think the Sinister Six will have any trouble standing on their own. I'm also intrigued by the involvement of Drew Goddard. I've enjoyed his work ever since his days on Buffy the Vampire Slayer. But in addition to this he's also working on the Daredevil Netflix series for Marvel. Hopefully those duties won't conflict with each other.