Mamoa In talks to join Marvel
He would have been perfect to play Kraven the Hunter in a spiderman related project but it appears that has already gone to Aaron Taylor Johnson. (not sure this really warranted its own solo movie but anyways)
Speculation seems to be that they are considering him for Namor the submariner. But considering how similar Namor is to Aquaman that seems a bit too ridiculous to me. It would be like Reynolds playing Deathstroke.