Echoes of Earth-616: Lost in National City

A freak tachyon anomaly at Avengers Tower tears through the fabric of reality, marooning Iron Man in the completely unfamiliar universe of National City. On this Earth, the Avengers do not exist, and no one has ever heard of Tony Stark. Armed with a fully functional Arc Reactor and his advanced Mark 85 nanotech armor, Tony faces a daunting obstacle: he is completely cut off from his own satellites, his databases, and his resources. Surrounded by foreign, alien-derived technology that operates on entirely different scientific principles, he has no idea how to calculate a way back home. Fortunately, he is taken in by the empathetic superhero Supergirl and her team of brilliant allies, who offer their help to solve an impossible multiversal puzzle.