In case you were wondering how the hell this happened, well, in the second film, Deadpool stole Cable’s (Josh Brolin) time-travel device to save his friends. He then used the device to travel the multiverse from his own universe into the main MCU universe known as Earth 616 (The Scared Timeline), which we only find out about in Deadpool & Wolverine. Now, this also happens to be 2018 (the time of Deadpool 2), when Tony would still be alive.