keep thinking that.
Do you really believe they would’ve added Sony characters if they had full rights?
Yes I believe that Kevin Feige and the president of the Sony studio both said Marvel handles the creative, Sony handles the marketing. In fact, one of the big issues when the shyt went down between the studios a while ago, Bob Iger specifically mentioned spreading Kevin too thin while he shepherds spider-man along with everything else they do.
So yes, I believe the producers, the studio bosses, and the fact the marvel studios logo is fixed on top of the spider-man logo for these three movies. its their production, its their show.
Now to the next point: Kevin Feige executive produced the first three spider-man movies and amazing spider-man. so it makes all the sense in the world for him, a guy who worked on those first three movies with Sam Rami, would want to bring some of that stuff back since he no doubt conceived a lot of it.
But maybe its like
@wire28 said and you just don't have access to that shyt that the rest of us do through a quick google search. my bad