Robert Downey Jr. teases something for tomorrow. Could it be Avengers-related?

Update: So it looks like Robert Downey Jr. was teasing us with his upcoming movie, The Judge, since the movie’s Facebook page shared the image. But what if The Judge was also excited to tease Avengers?

With Marvel and Disney releasing the official synopsis recently, Robert Downey Jr. tweeted that he has a surprise for us tomorrow. We’re not sure what it could be, but there are hints in the photo that it could be Iron Man and Avengers-related.

Seeing how Tues is the most productive week day I'll not lower efficiency. TMW tho, I'll throw a surprise your way… pic.twitter.com/fli5WWqT0z

— Robert Downey Jr (@RobertDowneyJr) September 16, 2014

As you can see, Downey is wearing a Black Sabbath t-shirt (the below is the full t-shirt). The band did the “Iron Man” song that was featured in the Iron Man movie.

So what could the announcement be? A trailer? Poster? What do you guys think?