What's his secret?
According to Marvel's Wiki page, while in prison, a " research scientist Dr. Noah Burstein recruited Luke for experimental cell regeneration based on a variant of the Super-Soldier process he had previously used to empower Warhawk. Burstein immersed Luke in an electrical field conducted by an organic chemical compound. When he left Lucas unattended, someone readjusted the experiment's controls in the hoping to maim or kill Luke, but instead his treatment was accelerated inducing body-wide enhancements that gave him superhuman strength and durability.
Will Dr. Noah Burstein and Warhawk.play in the series? watch and find out.