So apparently the Spider-man deal between Sony and Marvel is 6 films. One has already been Civil War, the next is Homecoming, the next 2 are the next 2 Avenger movies, and the last 2 will probably be sequels to Homecoming.
The speculation is Sony is making their own SM centric MCU for a few scenarios. One if the SM MCU movies bomb they may just not renew the dea with Marvel and introduce him back into their MCU after the 6 films are up. If MCU SM is a hit then they probably will renew the deal with Marvel and possibly introduce a Myles Morales SM in their MCU because many think the deal with Marvel is a Peter Parker version only.