What If: Sub-Mariner
This one-shot, written by Greg Pak and penciled by David Lopez with a cover by Carlo Pagulayan, tells the alternate history of Namor, who is raised by his human father on the surface instead of going to Atlantis with his mother because she died instead of his father. Namor then battles Nazis in World War II alongside this universe's version of the Torch. Later he discovers the Nazis have found Atlantis, enslaving the people there, and he goes to save his forsaken people.
Read more about this topic: Earth-717