Microsoft recently said that Ryse: Son of Rome will be getting some new content. Called the Morituri Pack, this downloadable content for the Xbox One will cost $8 and adds new content.
The new DLC adds three new arenas to be used in gladiator mode. They are Beacon, False Gods, and Revolution. Then, there are two more new arenas for Survival mode. Those are Sulfur River and The Forbidden Forest. Lastly, are five more arenas that are "optimized" for solo mode. Those are named Market and Garden, along with the already mentioned Beacon, Revolution, and False Gods arenas.