Doctor Strange accidentally messed up the timeline with Time Stone, causing Steve Rogers to die in the crash, so SHIELD get an immigrant to the US named Jackie Chan to be the next Captain America. Jackie Chan was treated with the last recoverable sample of SS Serum, restoring his youth and give him all the powers of Steve Rogers.
Victory Condition: Jackie must be able to survive to the end of Avengers: Infinity War.
Setting: Beginning of Avengers (have to skip Captain America: First Avengers).
Equipment: Circular Vibranium Shield
Prep Time: SHIELD gave Jackie Chan a 24-hours brief of whatever happened in the MCU at the beginning of Avengers, then prep time play out the same way as the movie continuity progression.
1. Movies Jackie Chan feats only.
2. Jackie Chan happened to be Bucky's friend and sided against Tony in Civil War.
3. In-character (Jackie Chan's casting persona) other than the point mentioned above.
4.Jackie Chan has composite skills, but not power, which was overrode by Super Soldier Serum (Steve's power, but not his skill; Chan's skill, but not his power).
Can SS-powered Jackie make it?