I know he said that he wasn't interested in directing a Thunderbolts movie after The Suicide Squad and I don't know if anybody can say which Thunderbolts comics he would have taken inspiration from or which characters he would've wanted on the team, but I mostly took inspiration from mainly Kurt Busiek's Thunderbolts run because it's the earliest, similar to how Gunn mainly took inspiration from John Ostrander's Suicide Squad for The Suicide Squad.