I'm going to cut to the chase already and just cut to the director who should direct the solo outing for...... Aquaman.
I'm not a fan of Cuaron's films (the one I did see and the trailers for the films I haven't. Makes no sense, I know) but, I think he would be able to create an accessable Aquaman film. If it's possible to make on successfully (I personally don't think so), I think Cauron could make a good Aquaman film due to the visual tones of his films, the development of the characters and stories and due to his acclaim from critics and fans. I simply think this one would be a no brainer. Maybe after Cuaron gets a hold of Aquaman, people like myself will finally take the character seriously (although he looks awesome in Injustice).
Wonder Woman
Nicholas Winding Refn last I knew is intersted in making Wonder Woman into a big screen film. I for one never really understood Wonder Woman except for what she stands for. But, she could be a superhero that women and young teenage girls and young girls in general could look up to. I think if he is still interested then he should do it. Nothing is better than having someone passionate about something and making a faithful adaptation (Unless your Kevin Tancharoen working on Mortal Kombat... Just saying). I think he could make a good Wonder Woman movie soely based on Drive. I don't think it's as good of a film as many make it out to be. But, I feel it's good enough to show his abilities as a director and land him the gig.
The Flash
I brought him up in my last Flash article. Sure, Night at the Museum showed he can do family films (they're not good movies but still) and Real Steel proved he can do action movies with heart. I think especially with Real Steel, he's proven he could take The Flash and really make it not only a good movie but also make him as he is in the comics which BattlinMurdock described as "the most marvel-y character in DC." and to be honest, that description fits. I think Levy could make The Flash a fun, pulpy film with character development, heart and action. Most would possibly disagree but, I support the idea.
Green Lantern
Reboot it first off. A sequel can not save the franchise. Not after the atrocious first film. Once you reboot it, grab Rian Johnson. Looper proved he can do a sci-fi action film while giving the characters development. Green Lantern is a sci-fi fi action film that needs character development. Just watch Looper. That should be all that's necessary to prove that he certainly fits the bill. He wants to make his own material first. Respectful and understandable. But, I say make him want to do this film. He could do this character and mythos a lot of justice and make the Green Lantern film we deserve.
Batman
Not starring, I would pick him to direct the reboot. Not because of Argo either (good movie, not as good as they want you to belive IMO). It's because of, The Town. The Town is my favorite Ben Affleck directoral effort. Edge of your seat action, strong romance, outstanding performances and is just an overall brilliant film. That is why I would chose Ben Affleck for Batman. Cause he can give us all of that in a Batman film. Plus, the gritty look his films have and the character focused films he's directed. I think he would make an outstanding Batman film.
I would add Martian Manhunter but I don't think a solo for him is necessary. What do you think? Anyone I miss? You got a different director for any of them in mind? Comment below with respect and be civil.