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So here are a few images of the other LEGO Guardians of the Galaxy set titled, Knowhere Escape Mission. Item number is 76020 with 433 pieces and reported price of $39.99. This set will have mini-figs of Groot, Rocket Raccoon, Nebula and a Sakaaran Soldier. Releases in June 2014.
UPDATE: Official photos of this set from LEGO added.
Guardians of the Galaxy releases on August 1, 2014.
(Image source: Guard The Galaxy)