People set up shop in Marvel, and it just became Doomsday

Introduction: Travel to the United States at the beginning of the MCU plot line. Moan, who came from afar, merged with Doomsday, the strongest single biological weapon in the DC universe, for unknown reasons, and gained all the power of Doomsday. At this time, Tony Stark was still a playboy, Captain America was still a piece of ice, and Black Widow betrayed the Red Room and joined S.H.I.E.L.D. Everything seems to be in time. What does it have to do with me? I just want to live a peaceful life. So the system chose a piece of land for him to open a coffee shop, but he managed to open it right in front of Stark Tower. Mo An:? I think you are just trying to make things difficult