Deadshot is a major character in the DC universe, usually featured either as an antagonitst. A ruthless cyborg, masked assassin, and mercenary for hire usually employed by a powerful figure like Queen Bee, Deadshot is appears as a minor nuisance to the Justice League. He is briefly featured in the Non-Disney vs. DC Villains War.
Non Disney Vs DC Villains War
DC Vs Marvel Villains War