First, a few thoughts:
-A movie title needs to be easy and fun to say, it needs to look good on the marquees and billboards, and it should tell you something about what you can expect. Die Hard was based on a book called "Nothing Lasts Forever." Who would read that title and not assume a romance or a heavy drama?
-Maybe it's not as easy as one might think because there's so much that hasn't been tried in superhero movies:
Sure, there are literally hundreds of titles from the comics, story arcs, sagas, etc. But if you name your movie after a specific story arc from the comics, it is implied that you are doing a film version of that arc. At least at first. The majority of people who see the movie will not have read the comics (or at least not that arc), so the title is really not the thing that the fans are most concerned about. They're concerned that the movie is true to the spirit and the themes of the comics, and that it is well acted and well directed and has a great story. If they're a fan, they're going to see the movie no matter what the title is.
-Look at the James Bond movies. Not once have they had to put Bond's name in the title of anything, unless you count the "[fill in the blank actor] as Ian Fleming's JAMES BOND in....[title of movie, usually from the book]" But when you hear those titles, all 20-odd of them, everyone knows right away that it's Bond.
-As far as I can tell, The Dark Night is the first Batman movie without the word "Batman" in the title. But everyone knows it's a Batman movie. Will the next Superman movie be "Superman: The Man of Steel" or just "The Man of Steel"? Would the latter be any less of a Superman movie than the former, just by the title?
So with that in mind, I will start things off simply.
Here's some titles of graphic novels and collections that I think would look good on a movie poster, regardless of the storyarc:
AVENGERS ASSEMBLE
AVENGERS: GALACTIC STORM (the title is cool, I don't care what the movie's about)
BATMAN: BROKEN CITY
CAPTAIN AMERICA: SENTINEL OF LIBERTY
CAPTAIN AMERICA: WAR AND REMEMBRANCE
DAREDEVIL: MAN WITHOUT FEAR (perfect for a reboot/sequel, like hulk & punisher)
FLASH: BLITZ
GREEN LANTERN: EMERALD DAWN (or QUEST or something with "Emerald")
JUSTICE LEAGUE: THE BRAVE AND THE BOLD
WONDER WOMAN: SPIRIT OF TRUTH
And a few where I think the actual story arc should be the movie:
BATMAN: THE LONG HALLOWEEN
GREEN LANTERN: SINESTRO CORPS WAR (I don't know how it would be made, but the title sure does tell you everything you need to know)
IRON MAN: ARMOR WARS
A cool original would be something like:
X-MEN: APOCALYPSE (simple and effective)
Anyone got a badass title for a Deadpool sequel?