The son of the second Jack-in-the-Box and Tamra Dixon, Jerome Isaac Johnson is a normal teenager who have mixed feeligns about his heroic legacy, with a desire of following it but not feeling being at the same level as his father and his grandfather.
Previously, Jack-in-the-Box met future versions of his son: One was the Box and the other was called Jackson. The one who called himself Jerome has just traveled back in time to know his father. He's a college professor doing some research in chronal flow. All the versions had in common the fact than Jac-in-the-Box had been killed in action and never knew his son. This motivated Jack to retire from active superheroics and be replaced by Roscoe James, one of the Trouble Boys. This actiona and the recent appearance of Jerome as a kid implies than such alternate futures were averted.