Yes, it is Second Coming. I looked it up, and it's New Mutants 14 and the artist is Ibraim Roberson. There isn't much more of Namor in that issue. But, Roberson did draw some Namor in one of the Escape From the Negative Zone annuals ... Was it the Uncanny X-Men annual? It wasn't the Namor annual, cause Max Fimura did his. Nick Bradshaw did one of them, and Ibraim did the other.