Just when we thought 'Avengers: Age of Ultron' could not get any bigger, Robert Downey Jr. teased yet another big announcement for tomorrow!.

According to Downey Jr.'s Twitter account, a 'big Avengers announcement' is coming tomorrow for fans!! Dropping the hashtag #unscramblintime, along with a partially-covered photo of what looks like Iron Man's armor, Downey Jr. has teased his huge fan base and Avenger aficionados as to what it may be!

The picture looks to be the shoulder armor for one of the Iron Man suits Downey wears as Tony Stark in the Avengers: Age of Ultron movie, specifically the one seen in this solo poster seen at right. The white overlaid graphic is unable to be made out. Well, looks like we just have to wait for this new exciting development!!

Marvel Studios presents 'Avengers: Age of Ultron,' the epic follow-up to the biggest Super Hero movie of all time. When Tony Starktries to jumpstart a dormant peacekeeping program, things go awry and Earth's Mightiest Heroes, including Iron Man, Captain America, Thor, The Incredible Hulk, Black Widow and Hawkeye, are put to the ultimate test as the fate of the planet hangs in the balance. As the villainous Ultron emerges, it is up to The Avengers to stop him from enacting his terrible plans, and soon uneasy alliances and unexpected action pave the way for an epic and unique global adventure.

Marvel's 'Avengers: Age of Ultron' stars Robert Downey Jr., who returns as Iron Man, along with Chris Hemsworth as Thor, Mark Ruffalo as Hulk and Chris Evans as Captain America. Together with Scarlett Johansson as Black Widow and Jeremy Renner as Hawkeye, and with the additional support of Don Cheadle as James Rhodes/War Machine, Cobie Smulders as Agent Maria Hill, Stellan Skarsgård as Erik Selvig and Samuel L. Jackson as Nick Fury, the team must reassemble to defeat James Spader as Ultron, a terrifying technological villain hell-bent on human extinction. Along the way, they confront two mysterious and powerful newcomers, Pietro Maximoff, played by Aaron Taylor-Johnson, and Wanda Maximoff, played by Elizabeth Olsen and meet an old friend in a new form when Paul Bettany becomes Vision.

Written and directed by Joss Whedon and produced by Kevin Feige, Marvel's 'Avengers: Age of Ultron' is based on the ever-popular Marvel comic book series 'The Avengers', first published in 1963. Get set for an action-packed thrill ride when The Avengers return in Marvel's 'Avengers: Age of Ultron' on April 24, 2015.

Watch 'Avengers: Age of Ultron' Trailer