Unfortunately the only way a Justice League movie in our time would work would be if they had Brandon Routh play Superman, Christian Bale play Batman, and Ryan Reynolds play the Green Lantern because fans are already going to be invested in those characters, if they change them within the same decade the fans will lose interest and it wouldn't make as much money, so for all our sakes, we need to hope for those 3 to agree.
JUSTICE LEAGUE
Superman/Clark Kent-Brandon Routh
Batman/Bruce Wayne-Christian Bale
Green Lantern/Hal Jordan-Ryan Reynolds
Wonder Woman/Princess Diana-Bridget Regan (Looks EXACTLY like her)
The Flash/Barry Allen-Michael Weatherly (Has the smart ass personality)
Aquaman/Arthur Curry-Josh Holloway (this Aquaman isn't the boy scout from Super Friends, but not a hobo looking guy with a mullet. He's in between.)
INJUSTICE GANG
Lex Luthor-Kevin Spacey
The Riddler-Zachary Quinto
Poison Ivy-Emily Blunt OR Erin Cummings. Only one I had trouble with.
Gorilla Grodd-Andy Serkis (For those of you who don't know, Andy CGIed King Kong in the King Kong movie. This would basically be the same thing)
Sinestro-Mark Strong
Cheetah-America Olivo
Black Manta-Harold Perrineau (If his mask didn't fall off, you could use anyone)
Doomsday-Stone Cold Steve Austin (Though he has a rap as a bad actor, this character rarely says any full sentences, and Stone Cold already has a big body and bald head, allowing only minimal work to be done for this character)
The plot should read as follows:
Film opens with Lex Luthor devising a plan on his computer to defeat the Justice League named PROJECT INJUSTICE. Pans to files on his desk on The Riddler, Poison Ivy, Cheetah, Gorilla Grodd, Sinestro, & Black Manta, as his computers determines the locations of the 6 people. Pre movie credits end as he grins and prints the coordinates and as he logs off you see on his computer, the words "Cadmus experiment: DOOMSDAY" as the screen goes black.
Next scene is of Superman coping with his regular day life at the Daily Planet with Lois Lane, Olsen, and White. He is talking about Supermans recent victory over Toyman & Parasite. The feat that he conquered TWO villains at the same time. He then sees on the TV Lex Luthor has issued a threat to Superman about a bomb in front of the a big building. Superman exits to attack the threat.
Bruce Wayne is in town in Metropolis in his limo with Alfred when he sees the alert for bomb. Knowing he will miss his press conference, he dons the Batsuit and heads off into the night.
Luthor meets with Superman in the middle of a large open area and Superman threatens to take him to jail but Luthor seems calm, then out of nowhere, Sinestro attacks Superman into a wall, followed by Grodd picking him up and throwing him, caught in vines by Poison Ivy and brought down in front of the Riddler who finishes it off with a punch from kryptonite infused brass knuckles. Leading fight in which Superman is about to be beat til Batman shows up and saves him and takes him away.
Superman wakes up in a penthouse in Metropolis and seeing Bruce he panics as he starts to run away but due to his injuries doesnt make it far. Bruce tells him that he rescued him and that he wont reveal his secret. Superman doesnt know Bruce is Batman yet.
As Superman returns to the Daily Planet, he learns that this new team dubbed The Injustice Gang has taken down The Flash, The Green Lantern, & Wonder Woman. As he leaves the Daily Planet for the day he is approached by Aquaman, and it is revealed they know each other. They learn that Lex has orchestrated this team to beat Superman, but it is affecting all the superheroes and if they dont ban together they will all be taken out. He then shows him that he rescued the other three and they will make a stand against the Injustice Gang.
The gang breaks into a Cadmus Labs facility in Gotham and meet Amanda Waller who is critically wounded in an attempt to hide the location of an experiment that they were conducting. As Batman arrives and is questioning her, he is approached by the team and they tell him about the idea, and Superman comes to realize that he is the man that saved him. Batman shrugs them off and thinks he doesnt need them.
Batman tracks the team to a facility in Metropolis and is discovered and attacked by them and beaten, almost killed. They manage to steal a very big container and he hears a thumping from within.
Bruce wakes up in the same penthouse, this time he is in the bed and Superman is waiting in the room and asks him once more for his help in banning together and beating this team of villains. He agrees and as Luthor announces that he will unleash doom upon the world they converge back in the same place the first battle happened, and a fight between the two teams end with the Justice League being victorious and Luthor stands next to the crate and says, that this was what he was after and opens it revealing, Doomsday, a genetic experiment designed to be a more advanced Superman and attacks easily dispatching of Aquaman, Wonder Woman, Flash, and Green Lantern. Batman and Superman make a futile attack on it, til Batman realizes that Doomsday must have the same weaknesses of kryptonite and when Batman takes the kryptonite brass knuckles from Riddler he manages to gain an upper hand until Superman manages to trap him within a giant rock and melt it around him so he couldnt move. The League then rounds up the villains remarking that Luthor escaped but he would be back and they would be ready.
The next scene shows Superman, and Batman talking in what appears to be an office, with Bruce going through some files talking about how they are not the only ones out there that have these gifts and they cant allow things like the Injustice Gang to happen again as he throws down files that you can see say Green Arrow, Black Canary, Zantanna, & Cyborg. Superman agrees and walks out as he thanks Bruce for donating one of his facilities and as he walks out camera pans behind him and they gaze out a window to show that they have made a base in the Watchtower, a Wayne Enterprises satellite as it hovers around the world.
After the credits, a battle worn Luthor returns to a secret base and receives a message from a Dr. Milton Fine and wants to discuss what he has been doing and says that he would like to help.
