Why? The first one was very experimental. They release a second one they are given two bad choices. They continue the original cinematic vision but being a sequel the plot suffers and it fails or they try something new and it falls flat.
Why ruin a perfectly, self contained, what I would consider masterpiece by trying to expand the universe.
I would be ok with exploring the world some more but maybe in more traditional heros tale type outline. Even then half the audience will think your getting, excuse the bad joke, "district 10."