I'd mostly agree on Doomsday though he'll always have "the thing that killed Superman in that story you always hear about" cred. Darkseid at least has more impactful appearances with an personality where he's treated like a big deal.
I have a feeling the game would avoid Ares, or at least save him for a sequel, to avoid GoW comparisons. But he and Cheetah were also the WW villain reps they went with for WW in the Injustice games (*spit in disgust*) so they both have precedent.