Susannah/Susanna seems the most likely to make a comeback.
Suzette sounds too childish and was never terribly popular to begin with.
The Narnia association in a positive for
Susan, but the only people I've encountered with this name are in their 50s, so it comes across as dated. Maybe in another 20 years it will be vintage/retro.
Suzanne is my favorite. I associate it with
Suzanne Pleshette, but their is also a
Leonard Cohen song that I don't care for.