10 Steps To Perfectly Bring Dr. Doom To The MCU
3. The Snap
The content of this entry depends entirely on how events play out in Avengers 4. If time travel is used to keep Thanos from ever snapping his fingers in the first place, then this becomes moot. However, if the Avengers must instead reverse Thanos' actions after the fact, then this scenario is ripe for Von Doom's political ambitions.
Once Thanos snaps his fingers, half of the population of Earth disappears. With them goes most of the executive government of Sokovia, with the exception of the insanely popular Minister of Defense, Victor Von Doom. Suddenly, despite his youthful age, Von Doom is the highest ranked government figure in Sokovia. Bolstered by his strong support from the Sokovian population, Von Doom is quickly sworn in as interim "leader," whether that position happens to President, Chancellor, or Prime Minister.
Von Doom's popularity remains at an all time high even after the missing half of the population is restored. When the former leader of Sokovia reappears and demands their seat back, this is the perfect opportunity for Doom to cross the moral event horizon, so to speak, and order an assassination, if not completing the deed himself. After all, Doom IS by far the most qualified person to protect Sokovia, at least in his own mind.