Sony's plans had been set all the way through May 4th 2018 and The Amazing Spider-Man 4, but with the two new villain films added into the mix, there's a shifting of the schedule. Producer Matt Tolmach now says we may see Venom and Sinister Six before 'Spider-Man 4' arrives...
Tolmach: "Before we know what we do with Spider-Man 4, we're going to do 'Sinister Six,' 'Venom' and '[Amazing] Spider-Man 3.' There is going to be a lot of crossover in those movies. So we're just not at 'Spider-Man 4,' because we still have a whole other Spider-Man movie and two other movies. So we don't know yet what [Spider-Man 4] is going to be."
The 2018 date isn't going anywhere, nor is the 2016 date for The Amazing Spider-Man 3, but there's a very real possibility they'll be occupied by one of these other movies. In regards to what writer/director Drew Goddard has planned for Sinister Six, Tolmach and Avi Arad say they'll be telling a story of redemption, which makes sense for a movie about a bunch of criminals. At the same time, is that what their fans really want to see?
Arad: "[E]verybody's looking for redemption. They're unforgiven... As long as there's that one thing in common: they'll hate Spider-Man. They'll hate him because he's so different from them. But then, you know when you sit by yourself somewhere and you think about it, they all had a different life at one time and that's what's so beautiful about the Spider-Man universe."
Tolmach: "There's no such thing as just a villain. There are villains by virtue of choices that people make but they always begin as humans, as characters. As flawed people; as tragic people. You know great movies have been made about a bunch of bad guys who get together to do something.”[DenofGeek/IGN]