4. Jimmy Woo
Jimmy Woo is an interesting character that has old roots but from what I know has received a major overhaul to get to his current role in the comics. Cameos in comics usually serve to expand the limits of the universe from the main characters point of view, and to remind the reader that there is a whole world of awesome out there. Agents of SHIELD should honor that idea by allowing guest stars to truly expand the lore, give the story an immediate boost in terms of depth. Woo represents a take on, not only SHIELD, but the world at large that isnt shared by everybody. He could be used to give the viewer an overview of human life in a universe where what is and isnt possible is redefined by the day. If done right, Jimmy Woo can directly represent the viewer in certain situations.