I think a 'Samus x Captain Falcon fanfic' can be really interesting. It might explore the dynamic between two very different characters. Samus is a strong, independent female bounty hunter from the Metroid series, while Captain Falcon is a cool, fast - driving hero from F - Zero. In the fanfic, they could team up for an epic adventure, perhaps facing a common enemy that threatens both their worlds. It could also delve into a potential romantic relationship between them, which would be quite a unique take given their different backgrounds.
In the comics, Falcon has not taken on the mantle of Captain America. Captain America is usually depicted as Steve Rogers or other established characters in the traditional storylines.
In certain comic arcs, Falcon took on the mantle of Captain America. This happened as part of evolving storylines and character developments within the comic universe.