If it's crap ... We'll tell you
I'm kind of pissed off at DC for neglecting the comic book vigilantes. That is, except the almighty, untouchable Superman (which I've grown more fond of since Nolan is a producer on this one) and of course, DC's saving grace: the Dark Knight trilogy. Without the Dark Knight, DC may as well invite fan boys to burn down their HQ. Seriously, what else has DC done in the movies? Sure, DC makes Justice League spinoffs and Batman kids shows, but everyone knows that movies are far more impactful than Wally West strutting around firing wisecracks at every bloke he sees. Here are some comic book heroes that would make for excellent movies if done right (Oh, I almost forgot, Zach Snyder, don't give the Man of Steel the Watchmen treatment... pretty please!!)
Flash--- Come on, if Wally West can get a promotion at Burger King, he can certainly induce a corresponding movie franchise to chase after him. If DC got the right actor, say Ryan Gosling or a less cheesy Zac Efron, I could see this movie coming to fruition. Granted of course, the script isn't a total piece of garbage and the effects/action sequences aren't completely botched (i.e. Green Lantern). The key is making the Flash lighthearted at its core but still, by and large, a superhero movie. They made Peter Parker in the Amazing Spiderman devoid of any sort of distinguishable humor that was present in the comics, which made the movie less memorable.
Wonder Woman-- Wonder Woman is essential to DC's long term well-being. She could tie into a Justice League storyline, provide another figure for comic novices to root for, and be a strong female character that would stand in stark contrast to the overarching fictional male heroes. Plus, it'll be a change to see an actual female overpowering opponents, instead of unrealistically flying around the screen doing kung- fu ( ahem, ahem Catwoman and Black Widow) while doing makeup and eating a salad all in one sequence. Oh yeah, and please don't cast some hot chick who cannot act. Megan Fox: I'm looking at you.
Martian Manhunter-- Manhunter should be the coolest adaptation of these three, given that his powers are similar to those of Superman. Heck, Superman even says that he's the most powerful being on Earth. I would love to see DC cast Morgan Freeman as Jo'nn J'onnz. Couldn't you see Morgan Freeman just walking around with a cane... going YOU DON"T KNOW WHAT IT"S LIKE BEING A MARTIAN SONNY... Denzel or Forrest Whittaker would also be good choices.
Make another Green Lantern. And don't make it dumb this time.
Nightwing-- If they do make a Nightwing spinoff, Joseph Gordon-Levitt should stay in that character (I know, he was supposed to take over Batman's helm at the end of TDKR)
Also DC, don't remake Batman for another 5 or 10 years. And do not just make a random Justice League movie without developing these characters. It's time for Superman and Batman to step aside, because you guys can't defeat Marvel in the eternal movie struggle without an adequately developed supporting cast.