With Marvel Studios releasing the official synopsis for The Avengers 2 yesterday, the trailer release could be imminent as well.
That's what Robert Downey Jr. may be hinting and teasing at as the Iron Man actor stated the following on Facebook:
Seeing as how Tuesday is the most productive day of the week, I'll not decrease the efficiency. TOMORROW AM, however, I'll throw a surprise your way...
Robert Downey Jr. also included the following image of himself, and if we take a closer look we see the Black Sabbath t-shirt under his coat. Tony Stark wore the Black Sabbath t-shirt in The Avengers movie.
Robert Downey Jr. isn't the only one to possibly tease The Avengers 2 trailer as Mark Ruffalo recently stated "something is coming" as well.
Regarding if it's an Iron Man 4 announcement, just recently Robert Downey Jr. stated Iron Man 4 is not in development.
Update: It's for Robert Downey Jr.'s new movie, The Judge.
From The Avengers:
"The Avengers: Age Of Ultron" hits May 1, 2015 directed by Joss Whedon starring Robert Downey Jr., Chris Evans, Chris Hemsworth, Scarlett Johansson, Mark Ruffalo, Jeremy Renner, Samuel L. Jackson, Elizabeth Olsen as Scarlet Witch, Aaron Taylor-Johnson as Quicksilver, Paul Bettany as Vision, with James Spader as Ultron.
Head on over to the Cosmic Book News Avengers movie hub for more.