Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

So from the very beginning of Avengers:Age of Ultron we see Tony Stark flying around as Iron Man, we also see the Iron Legion and an automated repair room for them. There is also "Veronica" The Hulk Buster, and a War Machine without the ugly paint job. So did I miss an "Iron Man 4" movie when he built all that stuff? Is it actually ever explained where he got his suits from, considering he blew them all up in Iron Man 3?
How did Tony Stark get his new suits?