While it's speculated that Avengers: Age of Ultron will open with an attack on Baron von Strucker's castle, as the team liberates future members Scarlet Witch and Quicksilver, there is still much we don't know about this raid, aside from some of the snowy images we've seen with Bruce Banner and Hawkeye tromping through the very cold Sokovian forest. Now, we have a couple of images from this action-packed set piece from the sequel. And it reveals not only a HYRDA tank but also Strucker's HYRDA army.

These images are from a kids' picture book, and they piece together events from early on in the movie. We see Chris Hemsworth smiling as Thor, ready for battle. Next, we see a tank as it patrols the Sokovian countryside, protecting a base that is more secure than any The Avengers have ever faced before. The place is surrounded by heavy security. We see these HYRDA forces in the next photo, which offers a look at these operatives as they are decked out in Chitauri armor that HYDRA collected after the battle of New York. While we don't get to see much of what goes down in Sokovia, we do get a final image of the team celebrating back at Avengers Tower, moments before Ultron makes his first entrance.

Marvel Studios presents Avengers: Age of Ultron, the epic follow-up to the biggest Super Hero movie of all time. When Tony Stark tries 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. The team must reassemble to defeat Ultron, a terrifying technological villain hell-bent on human extinction. Along the way, they confront two mysterious and powerful newcomers, Wanda Maximoff and Pietro Maximoff,, and meet an old friend in a new form when J.A.R.V.I.S. becomes Vision. Take a look at these latest photos:

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