As good as this movie may end up being, and as well-received as it may be, I feel like this will could have one shortcoming that might keep it from thriving in the same way as WW did, and that is that Aquaman getting a solo film doesn't really have the same societal and historical significance that was there with Wonder Woman. So I think it would be unwise to center all the promo for the movie on Momoa. They've gotta really put Mera out there too.
I believe Momoa said this would really be a partnership between Arthur and Mera. Exploit that.