On top of the base game being released, a special collectors edition will be available as well. This includes the game in a steel book, an artbook, OST, a PS4 theme, and a Joker mask with a stand. It'll cost you an extra 30 bucks, but it might just be worth it for you die hard fans out there.
For those of you who missed what Persona 5 Royal is, check out my earlier post that explains things a bit better.