The idea of aliens visiting ancient cultures is my own personal peanut butter-chocolate combination, since I love sci-fi and I love ancient history.
This idea has shown up in Prometheus Rising and Mecha Omega and it will show up in Stranded, at least in a way.
I'm not sure if I'll address whether ancient starships visited an ancient Earth but there will be ancient starships aplenty to explore and be killed by in Stranded.
The planet itself is a sort of interstellar sargasso sea, where starships have been crashing for centuries. Discovering the secrets of why ships malfunction near the planet, as well as cannibalizing countless alien starships for technology, will be critical challenges if players are to ever escape their prison.
Even communications are affected, which might actually be one of the first serious challenges. With no way of communicating with scouting parties, the entire settlement will be in much greater danger from the world's many hazards.