Don Markstein says it well:
http://www.toonopedia.com/subbie.htm
" The future is likely to be more of the same. Subbie is a little too prickly to qualify as a major headliner — but too interesting a character to disappear completely."
Another good article about Bill Everett, creator of Namor:
http://jimhillmedia.com/mb/articles/showarticle.php?ID=904
"The familiar triangle face, arched eyebrows, elfin ears and ankle wings made the Sub-Mariner stand out in an era known for its strange looking heroes and villains. But it wasn't just the distinctive Everett artwork that made the character special. The plots and the characters propelled the story along at breakneck speed. There was great power and nobility in the charact2r who ruled the oceans, and Everett's early writing so firmly established these traits that it would be difficult to imagine a different interpretation of the Sub-Mariner. Namor fought everyone, including himself. Torn between two races, he would never know peace. Everett's writing illuminated this aspect without sinking into unnecessary verbosity."
Also, it tells us that Bill Everett is also the first artist that ever drew Daredevil.