It’s expected that Maz is going to ultimately prove to be a vital character in the development of Daisy Ridley’s Rey — though we really know nothing about her role in Star Wars: The Last Jedi (and apparently that’s exactly how Nyong’o likes it).
Of course, it’s worth noting that the actress is actually in a very powerful position within the Star Wars universe, and it’s very likely that she holds onto some key details about the future of the franchise.
In the recently-revived series, Lupita Nyong’o plays Maz Kanata — an alien who is not only incredibly old and has seen a great deal of the past, but who is also better connected to the larger universe thanks to her relationship with The Force.