Marvel Studios has released another "extra" feature that will included in the Blu-ray version of James Gunn’s Guardians of the Galaxy, which will be available on December 9th, an outtake that features a "dance-off" between the GotG protagonists. 
 
Also released in conjunction with making Guardians available for digital download yesterday was a featurette in which Groot (voiced by Vin Diesel) says his signature line in 15 different languages (see "Marvel Releases 'I Am Groot' In 15 Languages").