A bright future

The future is looking bright Steven universe and the Crystal Gem now that they ended the gem war. But things go dark when a mysterious new gem arrives with a plan to destroy everything Steven worked hard to achieve. Now Steven must stop this new gem threat, along with (Y/N) by his side.

Quick Note: I know I'm late with this idea, but I wanted to do this for a while.
Spoiler warning: If you haven't seen it (and I don't know who hasn't seen it), don't read this and watch the movie first.