We have been receiving certain hints for quite a long time about the Reverie meet that is going to happen this year. As per the latest chapter(735), it clearly looks to be a significant event. We can expect some big decisions to be made which would obviously change things around quite a bit throughout the world.
We can discuss more about the possible events/decisions that you believe could happen in the Reverie this year.
For starters, the whole concept of Shichibukai might be removed altogether.