The still shows Gamora (Zoe Saldana), Peter Quill (Chris Pratt), Rocket Raccoon (Bradley Cooper), Drax the Destroyer (Dave Bautista) and Groot (Vin Diesel), standing in a lineup.
Vin Diesel was officially announced as the voice of the sentient tree Groot in late December, after rumors swirled he was attached to the movie.
Disney also released the official synopsis along with the still:
"An action-packed, epic space adventure, Marvel’s Guardians of the Galaxy expands the Marvel Cinematic Universe into the cosmos, where brash adventurer Peter Quill finds himself the object of an unrelenting bounty hunt after stealing a mysterious orb coveted by Ronan, a powerful villain with ambitions that threaten the entire universe. To evade the ever-persistent Ronan, Quill is forced into an uneasy truce with a quartet of disparate misfits–Rocket, a gun-toting raccoon, Groot, a tree-like humanoid, the deadly and enigmatic Gamora and the revenge-driven Drax the Destroyer. But when Peter discovers the true power of the orb and the menace it poses to the cosmos, he must do his best to rally his ragtag rivals for a last, desperate stand - with the galaxy’s fate in the balance."
The action adventure also stars Benicio Del Toro, John C. Reilly, Lee Pace, and Doctor Who’s Karen Gillan.
Guardians of the Galaxy opens Aug. 1, 2014.