In Ant-Man, we can see at one point that one of the potential buyers for the Yellowjacket (Darren Cross' version of the Ant-Man technology) has a tattoo on his neck. Under closer inspection, it becomes obvious that this tattoo is the logo for the Ten Ring terrorists.
Below is a picture of the character in question, and the logo for the Ten Ring terrorists for comparison (you may need to zoom in on the guys neck).
There are other pictures online that show the tattoo too - the one where the tattoo is most visible comes from a deleted scene.
Has anyone involved with either Ant-Man or the larger Marvel Cinematic Universe commented on this? I'd be interested to know what link, if any, this has to Iron Man 3 or the "All Hail the King" One-Shot.