Batman started off as a comic made by Bob Kane, by DC Comics. Batman is published by Warner Bros. Batman was made into 8 films so far, and as mentioned before is a comic book.
Iron man started off as a comic published by Marvel comics and created by Stan Lee, Iron man has made 3 films so far, and as mentioned before is also a comic book.
Captain America was originally a comic published again by Marvel Comics, but created by Joe Simon. There have been 4 films made about Captain America.
The Flash is so far only a comic book made by DC Comics, and made by Gardener Fox. There are currently no films about the flash out, however there is (According to IMDb) a flash film currently being made and is to be released in 2016.
Green Lantern was made into a comic book by Bill Finger, and published again by DC Comics. There is only one film brought out about Green Lantern.
THOR was actually a Norse God, but then Marvel Comics created a superhero with the same name but based on the Norse God. THOR was created again by Stan Lee, and there is 2 films about THOR however one of them is theaters on the 30th of October 2013.
Some of these have also been in a joint film, The Avengers 2012:
- Iron Man
- Captain America