No DC writers on other books think about using Ares? He's been in Injustice ever since it started. Plus, like others have mentioned, Cheetah isn't the only one with inconsistent portrayals over the years. Ares was different under Perez, Rucka, JMS/Hester, and Azzarello. I think the fact that he and the other Olympians are labeled as "gods" is laughable considering how various DC characters over the years have been able to harm or kill them including Wonder Woman, Superman, Darkseid, and Circe. In light of this, the Olympians aren't really gods but more so just extremely powerful super-beings ala Superman. You may not care for the Cheetah but she's usually the Wonder Woman enemy that gets put into the cartoons, movies, or made into an action figure.