Enjoy it for now. Amy Pascal is hinting at after Avengers: Infinity War and Homecoming 2 (or whatever they call it), Spidey comes back to Sony.

Spider-Man Could Exit the MCU After ‘Spider-Man: Homecoming’ Sequel



“One of the things that I think is so amazing about this experience is that you don’t have studios deciding to work together to make a film very often. In fact it may never happen again, after we do the sequel. Because Sony, and Disney, and Marvel all decided that the right thing to do was to allow Peter Parker and Spider-Man to be in the MCU and to work with the Marvel guys and have them produce this film. And I think that was a very rare thing for three companies to do, and a very brilliant thing for them to decide to do because there are only so many stories that you can tell again and again and again about Spidey, and this is something that we would have never been able to do in any other way. So it was a very selfless thing that very smart on the part of all the companies.”