"Agents of S..H.I.E.LD." season 3 will likely introduce "Live Mode Decoys" in the show, as well as connection with the "Inhumans" film.
Cast member Patton Oswalt teased that possibility that Live Model Decoys will be used in season 3. Oswalt told Zap2It that he has been reading all of the Marvel fan theories and speculations and jokingly stated that all of there theories about his character are all correct.
Although the answer Oswalt made was a joke, he did teased that there is more to his character and he does not want to further explain it. Oswalt characters Agents Sam and Billy Koeig explained that they are 13 of them in "Agents of S.H.I.E.L.D." with one of them, Eric, died at the hands of HYDRA sleeper agent Grant Ward (Brett Dalton).
In the Marvel comics, Life Model Decoys are robot duplicates that were designed by S.H.I.E.L.D. to impersonate an person, being controlled by someone through remote access. The LMDs are usually used by Nick Fury to fool adversaries into killing him, tricking them into thinking they have killed the "real" one.
Perhaps, the Koenig siblings will be revealing there secret during the second haft of season 3 and that all 13 of them could be LMDs being controlled by one person.
In other new, it seems that Clark Gregg wanted "Agents of S.H.I.E.L.D." to have huge connection with the "Inhumans" solo film. However, Gregg told Digital Spy that the "Inhumans" film will be on its own, meaning the movie will have its own standalone storyline that is different from Inhumans featured in the show.
The first haft of "Agents of S.H.I.E.LD." season 3 has been focused on saving and possibly recruiting Inhumans and other super powered beings in order to save them from terrorist groups such as HYDRA and from the Inhuman monster Andrew Garner/Lash (Blair Underwood and Matt Willig).
Gregg stated that he is still hoping that the show could have a huge contribution in the "Inhumans" movie considering that the film's release date will be three years ahead.
The second of haft of season 3 will feature the birth of the "Secret Warriors" and they are led by Quake/Daisy Johnson (Chloe Bennet) and its possible members could Lincoln Campbell/Sparkplug (Luke Mitchell), Alphonso "Mack" MacKenzie (Henry Simmons), Mike Peterson/Deathlok (J. August Richards), Slingshot /Yo-Yo Rodriguez, Joey Gutierrez (Juan Pablo Raba), Sebastian Druid and Stonewall.
"Agents of S.H.I.E.L.D." season 3 will return on March 8, 2016 on ABC.