Been having a few successes with this, lately, though I haven't really been on top of reporting my experiences. I'd say I'm at probably about a 70% hit rate. Most recent success was last night. (Haven't been trying every night, or even every other night, but just here and there.) Watched more of the Avengers, and then played some pre-cut audio from it, while I went to bed. Ended up dreaming about having a hand-to-hand battle against the Hulk, in a warehouse, and then a massive, New York (ish) street war, reminiscent of the final battle in the movie, but including Transformers.