Here’s a quote:
Now that the Batman and Superman film franchises have been revived, does the studio go after Christian Bale (”Batman Begins”) and Brandon Routh (”Superman Returns”) to star in a Justice League pic? Studio is also trying hard to bring Wonder Woman to the bigscreen.
To a large degree, casting will depend upon the story arc for the JLA feature and at what point in the superheroes’ lives the plot takes place.
Source, thanks to Stephen.