Most Profitable Superhero Movie Franchises

Interesting analysis regarding the most profitable 'Superhero' franchise of all time per Max-Bro.net:

Just how profitable are these superhero films for the Hollywood studios making them?

It’s easy to point to large numbers like the ones TDK generated, but then studios invest hundreds of millions of dollars into making these films. I performed some research into the matter and discovered some interesting finds. Below, in descending order, are the top ten most profitable superhero films starting from 1978 to the present day, with a big surprise at the end.

The most profitable Superhero? Those heroes in a halfshell...