According to Kevin Feige, no other Sony properties are yet included in Marvel’s cinematic universe. In an interview with Jo Blo, Feige had this to say:

Right now, Spidey is in the MCU and it’s just Spidey. Civil War, Homecoming, we’ve already shot a lot of Tom Holland’s scenes in the upcoming Avengers films, and we’re just starting to solidify our plans for Homecoming 2 – we won’t call it that, whatever it is – which is exciting because it’ll be the first MCU movie after untitled Avengers in 2019. It’ll be the way Civil War informed everything in Homecoming, those movies will launch him off into a very new cinematic universe at that point. Those five movies are we’re focusing on.

Amy Pascal had claimed otherwise, relatively recently, stating that Silver and Black and Venom are both “adjuncts” to the MCU. The claim seemed to shock Feige and turned him into an overnight meme.
Of course, nowhere in his quote does Feige say that other properties won’t join. He may be referring simply to the present whereas Pascal is referring to the near future or plans that have no been ironed out yet. He means as of yet Spidey is the only one. Others could join as a later date. Details may be on the drawing board. Details may be forthcoming. Or as Feige seems to say, Spidey is the only one, now and for the foreseeable future. Perhaps Pascal, who left Sony in 2015, was merely talking about what-if, or referring to some deal that fell through. But I really think she was talking about her plans for the characters had she not left the studio.