I'm all for this as long as they ignore the comics as much as possible. Don't give him a hook hand at any point, or a water hand because both were dumb, everyone knows it. Aquaman fans too, they're just in denial. Just say one of his powers is the ability to control all forms of liquid (blood bending anyone?) some liquids are easier than others and that because he lives under the sea (spongebob square pants) he has super strength and crazy durability. There you go, feel free to use any variation of his origin story (because Americans love the trope of an outsider being heir to a throne of a far away place and despite not knowing shit about the politics or people of said place, that person is by far the best choice to rule and understand the people because).
Don't mention shit about talking to/psychically linked to (aka talking to) sea life.