I didn't really think about it when the news was released but Diane Nelson was only named to be President for DC Entertainment but Paul Levitz was President & Publisher of DC. so who's going to be the new publisher?
odds are we will here the answer in a few weeks but until then lets speculate.
Nelson has praised the vertigo line so who knows maybe it will be Karen Berger or Shelly Bond if not either of them someone else that works in the Vertigo line.
Part of me wants it to be Bill Jemas just to see a large number of comic book fans head explode. I know a lot of fans didn't like him when he was publisher of Marvel but Marvel did put out some good comics during that time period and he turned marvel profitable after a period when they where going into the dumps.
but honestly I have a feeling they will pull someone that has publishing in magazine industry, like someone that worked in Time for kids. but that just a hunch that has no barrings in fact (like nothing any of the other guess in this post)