"Sons and Heirs" by Moore/Sprouse; Tom meets his biological son, born from genetic materials taken from him when in Nazi captivity. He's as strong as Tom, and he has an axe to grind.
"Tom Strong 2050 A.D.: Showdown in the Shimmering City" by Moore/Frank; A future tale of a showdown between Telsa and Tom's unknown son, Albrecht. But the real show is the face off between Ingrid and Dhalur.