Originally Posted by roach
The Dark Knight is a nickname for Batman....just like the Man of Steel. If you go up to a non-comic buyer and ask them who is the Man of Steel they will guess Superman. Avengers is the title of the comic and name of the team. Marvel name dropped Avengers in Iron Man. Every film built towards Avengers and Marvel made sure people knew Avengers was coming. World's Finest carries no weight to the general audience. Hell DC doesn't even call the book Worlds Finest.
They had a whole series that ran over 300 issues with that title for a span of 45 years.