So, I understand they've been having some problems putting together an Aquaman script.
May I offer a simple two-word solution?
I mean, you have dozens of Bob Haney-written Aquaman stories just lying around. Why not use one? I guarantee that the hoighty-toighty Hollywood writers aren't going to come up with anything better than this:
We start with bored playboy Peter Dudley...
After a whole issuer of being humiliated, Aquaman arrives just as Dudley has sacrificed himself to save Mera from some mutant/alien/what the hell thingie:
From Aquaman #34 (1967)