I don't see how Sony can possibly expect audiences to wait four years for a sequel to an underperforming film and still expect to make money. Marvel would just ship Spider-Man to Netflix but I have faith that they'd tell a better story. Plus, Sony is keeping Kurtzman around for reasons I can't even imagine.
It's telling that I have more faith in Fox's Fantastic Four reboot which Fox has done next to no promotion for than I do for any of Sony's Spider-Man films. I am that pessimistic.
I mean, Marvel Studios has Feige and Whedon and there's not the potential for James Gunn to become more of a producer as well. Fox has Lauren Schuler Donner, Mark Millar and Simon Kinberg and to some extent Bryan Singer. Sony only has Avi Arad, Matt Tolmach and Alex Kurtzman producing the films and none of them have a fanbase but all of them have very vocal detractors. The only person they have going for them on the production side is Drew Goddard who's handling a Spider-Man movie told from the perspective of villains.