Fan Casting Egghead/Edgar Heed in Batgirl: Shell of an Assassin

So in this instance he would be a former member of the League of Assassins but decided to go rogue once he found out about a certain plan for Gotham. Would be incarcerated at Arkham at the end, where he is questioned by Batgirl, where he is subsequently poisoned by Hugo Strange, or at least it would be insinuated (He would be watching the interview with Egghead and his poisoning with a smirk), his last words would more or less be, "Cald(cough)well."Some way of him trying to atone for his crimes? Would maybe commit the crimes as well as his former ones under hypnotic suggestion via Hugo Strange?