From Unofficial Handbook of the Virtue Universe
Blackjak came to Paragon from England after the loss of his entire team of heroes in the Rikti invasions of London. After the invasion, Jackson Alexander decided to go on hiatus and focused solely on his business, Alexander Enterprises, a multi-national corporation that specializes in...well, everything. Diversity is it's motto.
Now after years of avoiding his old identity, he finds himself again thrust into the role of hero. Still not over the loss of his team, he has discarded the name Jack Union and taken up a more secretive alias. He has also made a promise to himself and his former colleagues to never lead a team again and never let himself lose another friend. His return is difficult for him.
He has recently sought re-connection with his past by joining the Dawn Patrol's team in Paragon. So far he has been accepted, although he continues to keep his identity secret.
((Blackjak is currently "a bit Rusty" and is not the hero he used to be. He has somewhat obviously been through the wringer emotionally and physically and has only recently put back on a costume. He will tend to keep his private life private This is why he wears a full mask. His Jack Union costume showed at least some of his face and was much more flamboyant. He has changed up his fighting style as well to help distance himself from his past persona))