Further information has been brought forward out of the recent Sony leaked emails, I managed to find another quote regarding their 'solid' plan and them developing a ''Spider Division'' inside the company:
''What we need is a solid plan for the future. Clearly laid out for the next five years at least that shows the fanship and the public that Spidey is still in safe hands. I also believe that this studio needs a dedicated Spider Division that runs as a studio within the studio. Marvel and DC Entertainment are successful because there are dedicated resources and teams that just focus on these properties.'' - Juan Capdet
Part of their plan for their next five years involved a Spider-Man 2099 film that would've came out around the 2nd half of 2017, interestingly enough the Sinister Six film would've been pushed back into the first half of 2017 instead of their original release date of November 2016. But back to Spidey 2099!
Spider-Man 2099 was touted to be their ''Captain America-type franchise'', a period piece set in a futuristic New York City of 2099. Miguel O'Hara would've been Spider-Man instead of Peter Parker just like in the comics and would face off against the evil corporation Alchemax. Along with Alchemax, Sony was deciding between which villain to use, their choices were either Morlun who would've chased Spidey 2099 through time in order to 'devour' him. And the other one being Kron Stone, basically the 2099 version of Venom.
The end of the first film would've involved the villain(s?) being defeated at Alchemax and Miguel O'Hara/Spider-Man 2099 being sent back to present day NYC. Which would set up the next film (set for 2019) for a all-star team up between the Amazing Spider-Man (in the email being dubbed as 616-Spidey) and Spider-Man 2099 against the villain Carnage in a ''payoff level event''.
That ''payoff level event'' would become the film 'Carnage' and would've been set for 2019. In that film, or in Juan Capdet's words ''the event that everyone has been wanting. Cletus Kasady makes his debut and it will take a team-up like no other to take him down. Peter/Spidey, Miguel/Spider-man 2099, [Venom](movie:372411) and Black Cat join forces to bring him to justice. This would be a hard PG-13 with the possibility of an unrated bloodier version for home entertainment.''
I forgot to mention, that in between the release of the first Spider-Man 2099 film and Carnage, two other films came out. Those films were ASM: Venom and ASM: Black Cat. In Juan Capdet's words on Venom: ''Eddie Brock Jr "ultimate" origin story but with some 616 details. In the end Spidey defeats Venom and sends him to Ryker's. Coda shows the birth of Carnage''. And on Black Cat: ''Felicia Hardy gets properly introduced. We see her get her "luck powers" from Wilson Fisk/Kingpin. Eventually she has an encounter with Spidey and it ends with an understanding that she is not the bad person she appears to be.''
And finally, the second Spider-Man 2099 film (or if you want to get technical, the third one) would've had Miguel O'Hara still stuck in present day, racing against time to keep his future grandfather, Tiberius Stone, alive in order to save his own existence. The villain of the film would be Mac Gargan AKA Scorpion, and Spidey 2099 and him would battle it out for the life of his grandfather. Another subplot would involve Miguel trying to get back to his own time period of 2099!
So there you have it, seems like Sony had somewhat of a plan of where they wanted the Spider-Man franchise to go. Whether or not this would turn out they wanted it to will forever remain a mystery....unless Marvel has seen some potential in it.