I think most of them were killed by blackbeard and his nakamas, some maybe under blackbeard's rule, some hiding in the shadow being hunted down. Thats kind of irony since they once a superpower under the leadership of the strongest man in the world yet being hunted down like dogs in the new age.
Since Blackbeard was once with whitebeard pirate, most of his targets must be the remnants of whitebeard pirates since another yonkou maybe still neutral with him.
Edited by Ilan, 05 December 2012 - 02:04 PM.