Yah, she wouldn't work in the mash-up Wook posted, but I think she's the spitting image of a young Leia, and I would LOVE to see Disney give her her own movie.
They made a young Solo solo film - now make a young Leia solo film.
They certainly can and quite possibly will. Everyone seems very stuck in the past discussing this film franchise. In 10 years there will be 2X as many new Star Wars films in circulation as compared to pre 2003. There are endless possibilities and Disney owns a studio charged with making films. The Avengers: Infinity War is the 19th Marvel film. Think about it.