Earth-1199999 is a universe heavily inspired by the mainstream Marvel Cinematic Universe. As such, most of the films are inspired by their MCU counterparts, though how closely inspired they are will vary from film to film. The main difference between the universes is that, in this version of the MCU, Marvel Studios retained the rights to all its characters from the beginning.
Fantastic Four (2008)
Reed Richards (John Krasinski), Sue Storm (Emily Blunt), Johnny Storm (Zac Efron), and Ben Grimm (Ron Perlman) are brought together by the U.S. government to work on a top secret project... a portal to another dimension. After testing out the Quantum Gate, Reed, Sue, Johnny, Ben, and the project's Latverian supervisor, Victor von Doom (Rufus Sewell), get stranded in the highly dangerous Negative Zone. Four of them manage to escape, but Victor is left behind. Discovering their amazing new powers, the government attempts to use the so-called "Fantastic Four" as super-soldiers. Meanwhile, Annihilus (Alexis Denisof), the tyrannical alien ruler of the Negative Zone, is lead right to Earth, forcing the super-powered quartet to become heroes.
Iron Man (2008)
Tony Stark (Robert Downey, Jr.), self-absorbed millionaire playboy philantropist and CEO of weapons contractor Stark Industries, is captured by a group of terrorists known as the Ten Rings, lead by the mysterious war-lord Mandarin (Ben Kingsley), who force Tony to build them a powerful weapon. However, Tony and his fellow captive, Yinsen (Shaun Toub), end up creating a suit of powerful armor, which Tony uses to escape. Returning home, Tony decides to use this new technology to right the wrongs of his company, unaware that his second-in-command, Justin Hammer (Sam Rockwell), has formed a sinister alliance with the Mandarin.