Throughout the history of S.H.I.E.L.D. there have been a number of different variations of the S.H.I.E.L.D. logo. Even within the Marvel Cinematic Universe different versions have been used and it appears the creators of the Agents of S.H.I.E.L.D. TV series will not limit themselves to a single variation of the S.H.I.E.L.D. logo either. Here are the different variations we have spotted in the Agents of S.H.I.E.L.D. trailer.