Just a quick correction, Green Scar didn’t recede into Bruce’s mind after Caiera’s death, and “world breaker hulk” isn’t an actual hulk alter. All through World War hulk, and most of Pak run following it (and more) is ALL Green Scar. Since PKJ is iffy on exploring the alters and hasn’t given a real answer on the current hulk, the last we saw him would be the Aaron run. Although, the current hulk acts, looks, and is strong like green scar. He did have a brief appearance in Immortal Hulk, but it was a trick.