By The Eye of Agamotto! Doctor Strange In Marvel's Agents of S.H.I.E.L.D.?!
Check out what was spotted in the recent S.H.I.E.L.D. trailer --- right when the word "strange" was uttered.
Doctor Stephen Strange?
Agent Coulson described what they investigate, and when he says "strange and the unknown" the following is shown:
Check it out for yourself; around the 1 minute mark: