I'm not sure who's acting like dystopian fiction is a new genre, but clearly it's neither new nor specific to a time period or trend. The best in dystopian literature will always stand out. Create great characters and an engaging premise and your readers will come.The funny thing is people act like dystopia is this new thing or something. Studios are certainly trying to bank on its current resurgence, due to THG, but for instance The Giver is twenty years old, and just now getting an adaptation, but its been popular among young readers for years and years. Dystopia may fade a bit, but it is not a fad. It has a had a broad readership for a long time. Publishers may shy away from them, and then in ten years pick more up.
A Brave New World (1931)
Nineteen Eighty-Four (1949)
A Clockwork Orange (1962)
A Handmaid's Tale (1985)
The Giver (1993)
The Hunger Games (2008)