Re: Aquaman, Hawkman, Ant-Man - how would you run them?
I probably wouldn't, just 'cause animal sidekicks aren't a superhero trope I'm fond of. If I were forced, I'd probably go with the 'special effects of the power are using animals to do stuff' rather than a Summon, just for simplicity's sake (and not having to find stats for 87 different kinds of animals).