How can this be? In the last few minutes showing roses life in still pictures, jack isn’t in any of them.
Jack slipped below the surface. We thought he had died. But he didn’t! He was abducted by an underwater alien craft, resuscitated, and becaue the first “field” member of The Avengers. He actually predated Captain America.
However, he was unable to reveal his identity, so she was left to believe he was dead.
Oh, and yeah. the Titanic was sunk in a freak accident when it hit the alien craft. It was just blamed on the nearby iceberg, for obvious reasons. They felt really bad about it. Jack’s resulting powers and career were their penance.
But I’m giving away the plot...