Warner Bros. Pictures have just unveiled character art for the upcoming Green Lantern film on their Twitter stream. It comes after marketing was kicked up a notch at last weekend’s Comic-Con event in San Diego. The art designs each feature one of the main cast members: Ryan Reynolds as Hal Jordan (Green Lantern), Blake Lively as Carol Ferris, Mark Strong as Sinestro and Peter Sarsgaard as Dr. Hector Hammond.

The official synopsis is embedded below:

In a universe as vast as it is mysterious, a small but powerful force has existed for centuries. Protectors of peace and justice, they are called the Green Lantern Corps. A brotherhood of warriors sworn to keep intergalactic order, each Green Lantern wears a ring that grants him superpowers. But when a new enemy called Parallax threatens to destroy the balance of power in the Universe, their fate and the fate of Earth lie in the hands of their newest recruit, the first human ever selected: Hal Jordan.

Hal is a gifted and cocky test pilot, but the Green Lanterns have little respect for humans, who have never harnessed the infinite powers of the ring before. But Hal is clearly the missing piece to the puzzle, and along with his determination and willpower, he has one thing no member of the Corps has ever had: humanity. With the encouragement of fellow pilot and childhood sweetheart Carol Ferris (Blake Lively), if Hal can quickly master his new powers and find the courage to overcome his fears, he may prove to be not only the key to defeating Parallax…he will become the greatest Green Lantern of all.

Green Lantern is being directed by Martin Campbell from a script by Greg Berlanti, Michael Green, Michael Goldenberg and Marc Guggenheim. The film is based on the DC comic-book series of the same name, created by Bill Finger and artist Martin Nodell.

Check out the character art below:

Green Lantern will hit cinemas in June 2011.