I just wonder what that turn of events means. Marijoa ablaze, Imu stepping in and trying to conquer Elbaf, Imu as the arc boss may as well have started, which is before Blackbeard. Unless you think after these events, Blackbeard will be thrown in as an intermediate step. I would rather assume that it will be a battle royale of some sort, with Blackbeard invading Marijoa.