On one hand, I agree that Feige and the Russos aren't living under a rock, and they had a whole year to have ideas. And Feige always had plans B. So I believe there is a possibility of us getting something.
However, on the other hand, this movie really does seem like a finale. And there's a possibility of some of the big characters being dead or done for good after this movie. With that said, I also believe Feige will want the audience to focus on the feeling of goodbye, rather than getting them excited for the next properties.