Tracksuit Mark is a variant of Mark Grayson whose point of divergence came when Nolan revealed Viltrum’s true plan early and manipulated him into abandoning heroism, convincing him that Earth was already lost and that “if they can’t recognize you, they can’t target you,” leading Mark to discard the superhero identity, hide in plain sight wearing a tracksuit, and join Viltrum to raise the Viltrum Empire and destroy Earth.