Are there spoilers for AOU in the most recent Agents of SHIELD episode? I haven't read any of the rest of this thread in case people have talked about AOU in here (which they shouldn't), but there was mention that AOU scenes would feature in this week's episode. Is that the case? Or is it safe to watch before AOU comes out?
There's only one scene, and it's not interwowen into the episode. It's merely a 1 min action sequence that acts as the post-credits scene, and much of it has been seen in the trailers.
Nothing in this episode will spoil you to Age of Ultron, think of this as a Prelude to the movie.