Marvel's Agents of S.H.I.E.L.D. producer Jeffery Bell has confirmed that the blue alien corpse, which has played a major role on the show (resurrecting Phil Coulson from the dead) is indeed a member of the alien Kree race.  According to Bell, the alien identity of the mysterious blue figure will revealed in the December 2nd episode entitled "Ye Who Enter Here."
 
The Kree, who made their first appearance in Fantastic Four #65 in 1967, were created by Stan Lee and Jack Kirbry, and just as their influence on the Marvel universe has been substantial, their effect on the Marvel Cinematic universe appears to be increasing.  In addition to Lee Pace’s Ronan the Accuser, a Kree who appeared in James Gunn’s Guardians of the Galaxy, two Marvel entities with major Kree ties appear to be heading for the big screen: the Inhumans, who are the result of genetic experiments conducted on humans by the Kree in ancient times, and Captain Marvel, since Carol Danvers acquired her superpowers when her genetic material was combined with that of the Kree hero Mar-Vell (see "'Black Panther,' 'Captain Marvel,' 'Inhumans' Movies").

Bell also told TV Guide that a big reveal concerning one-name heroines Skye (Chloe Bennet) and Raina (Ruth Negga) will be coming on Agents of S.H.I.E.L.D.  Will the two brunettes turn out to be aliens as well?  The Kree who have been an obsession of Hydra since the 1940s will also reportedly provide another link from the S.H.I.E.L.D. show to Marvel’s Agent Carter series, which was teased in this season’s first S.H.I.E.L.D. episode (see "'S.H.I.E.L.D.' Premiere Flashes Back to WWII With Howling Commandos").