Fan Casting Don Allen in Return to the DC Universe

One of Barry and Iris Allen's twins born in the 31st century, due to their father's connection to the Speed Force, Don and his older twin sister Dawn were given heir father's speed by being conduits to the Speed Force. Don would eventually marry Meloni Thawne, with the two having their son Bart, before disappearing to Earth-247. Dying to save the world with his sister, now, the Tornado Twins are reborn, with Don spending time back and forth between the 21st and 31st centuries, getting to know his dad and his son.