I think as long as the filmmakers make the attempt to take the material seriously, then the audience wold be open-minded enough to follow suit.
I'm sure there's enough sufficient material from the comics that can be used to do a more straight faced adaption of Aquaman, since there's obviously more to him as a character than communicating with sea life.
The man is a king. A noble. He's master of over 70 percent of the Earth's territory. That's easily the most dense kingdom on the globe. If handled well, they could infuse foes like Black Manta and Ocean Master, the moral dilemma of Arthur being born both from an Atlantean and a Human...
Yeah, I think there's enough of a foundation to do justice to an Aquaman motion picture.