An upcoming announcement trailer details the DLC's features.
Also, Noctis and his crew will be able to don robes worn by Assassin members and perform signature AC abilities like the Leap of Faith and sneak attacks with the hidden blade.
All in all, it sounds like a pretty cool event, and even better is that it's free for all Final Fantasy 15 players. If you have not gotten the Dream Egg yet, you have until the carnival ends on September 30 to obtain it. Eurogamer has a guide for the carnival if you need help getting the Egg.
The developers have also prepared another special content that's scheduled to arrive on August 31.
The town of Lestallum will transform itself for the event with signs and banners signaling the arrival of the festival, and new activities will be available for players to participate in. This festival will give players the ability explore the game in the style of Ubisoft's franchise while also using some of the Assassin's Abilities. The teams' expression of mutual admiration eventually coalesced into this collaboration today.
No word yet on whether or not Assassin's Creed Origins will include any Final Fantasy XV DLC upon release. Ismail had this to say about the exciting collaboration, "This collaboration is the result of being huge fans.There's a lot of respect between the two teams and we couldn't be more thrilled with the opportunity to pay homage to each other's work".
So, what does collaboration mean for fans? The two development teams will be "paying homage to each other's gaming universes" as part of this new collaboration. This is a free, limited-time event that will run from August 31st to January 31st, so you'll have plenty of time to get in on the fun. The official announcement during gamescom was since commemorated with official artwork, showcasing the crossover between Assassin's Creed Origins and Final Fantasy 15.