I'm sure I saw this in a search the other day.
In fact:
http://www.killermovies.com/forums/showthread.php?s=&threadid=466498&highlight=title%3A%28Ultimate+Thor+vs.+Ultimate+Namor%29+forumid%3A77
http://www.killermovies.com/forums/showthread.php?s=&threadid=406508&highlight=title%3A%28Ultimate+Thor+vs.+Ultimate+Namor%29+forumid%3A77
http://www.killermovies.com/forums/showthread.php?s=&threadid=402672&highlight=title%3A%28Ultimate+Thor+vs.+Ultimate+Namor%29+forumid%3A77
Merge maybe?