Umm who's Namor?
Namor is one of those characters with the complicated movie rights, like The Hulk. Not impossible to have him in the MCU, but Feige called it “complicated” and I will take his word. So whether they want to work with complication would depend on whether we see him in a movie like Black Panther.
Namor movie rights are with universal studios just like the hulk
Nah I'd much rather see him in his own movie first than in a cameo or a supporting appearance.
Well if Namor is still own by another studio, then he would probably not get his own MCU movie. Black Panther would be a great place for him to appear.