In perhaps the most bizarre reveal in the trailer it seems as though the Mandarin has a Captain America shield tattoo on the back of his neck. Only this icon has an "A" instead of the usual white star.  From the minute this was discovered fans have been speculating what it could mean.  Perhaps this is a shot of someone from S.H.I.E.L.D. pretending to be the Mandarin? Is Marvel just trying to have some fun with the fans?  Needless to say, we haven't got a clue.