Deviant Art user Daniel Morpheus made the following Justice League Movie poster as a tribute to the Frank Quitely JLA Gallery cover.
Looks like he did his homework, too, as not only are the current WB movie stars featured such as Christian Bale as Batman, Henry Cavill as Superman and Ryan Reynolds as Green Lantern, but we also see Bradley Cooper as The Flash. Cooper was actually up for the role of Hal Jordan in the Green Lantern movie, was passed on in favor of Reynolds, and then was said to be up for the role of Barry Allen in a Marc Guggenheim scripted The Flash movie.
Likewise, the choice for Aquaman goes to Smallville's Justin Hartley (Oliver Queen/Green Arrow), who actually portrayed the King of the Sea in a defunct Aquaman pilot.
Regarding Bridget Regan as Wonder Woman, while I don't think she has officially ever been attached to the role, Regan is clearly the popular choice among fans to play the Amazonian Princess.
The same can be said for Doug Jones, I believe. Again, while he never played the shape shifting alien from Mars, Jones is no stranger to having played comic book characers before. Jones played the Silver Surfer in Fantastic Four: Rise of the Silver Surfer.
We even see the artist used the new Jim Lee designs from Justice League #1 in the poster Nice touch!
So Justice League movie in 2015, anyone?!