I was recently able to get some juicy details out of a long-time friend, who also happens to be a trusted source of mine, that Marvel and Sony, nothing but a few days ago, held what he described as a "mini-meeting" that only lasted about 40 minutes, where they went over the final kinks of a deal they looked too close to incorporate Spider-Man into the MCU.
Nothing much was really spoken about as the meeting neared an end, this is because Sony and Marvel had apparently ALREADY come to terms on an agreement and were simply tending to other smaller commodities.
To make a long story short, Marvel is now at liberty to have Spidey in any of their films, which will reportedly start with a cameo appearance in Cap 3 and/or an after-credits scene in Avengers: Age of Ultron, which will be filmed as soon as the deal is officially announced, if they decide to go that route.
He has also told me that the two companies are trying to keep this under wraps as best as possible just until after next month's Spidey Summit, which is when they will go public with this info.
Names were tossed around in the meeting as to who will play the beloved hero in tights, but Logan Lerman is currently the heavy favourite.