The Flash Villain "Professor Zoom" is played by John Wesley Shipp who starred as the Title Character in the Live Action Series "The Flash (1990)".
The prologue introduces a more complete "classic" version of The Outsiders where Katana and Black Lightning have their more familiar costumes from the comics and characters Halo and Geo-Force are brought into the team. The version of Geo-Force depicted is actually an amalgam of two characters. His costume design, hair color and name are associated with the original Geo-Force character whose alter ego is Prince Brion Markov. However, the color scheme of his costume as well as the powers he displays are actually from his half-sister Tara Markov who went by the code name "Terra". Terra was a member of the New Teen Titans and not with The Outsiders. Terra had the power to move and animate portions of earth and rock while Geo-Force had the powers of super-strength, the ability to alter gravity and the ability to fire "lava-blasts" from his hands. Both were given powers after treatment by a Markovian scientist by the name of Dr. Helga Jace.
Included as a bonus cartoon from the DC Comics Vault on the bluray release of Justice League: The Flashpoint Paradox (2013).