https://www.techradar.com/news/assassins-creed-odyssey-leaks-is-this-the-sequel-to-origins

Pre-E3 announcements and leaks are everywhere at the moment and the latest leak may have just revealed the next game in the Assassin’s Creed series, Assassin’s Creed Odyssey. 

French site Jeuxvideo has posted an image of a keyring for a game called Assassin’s Creed Odyssey. The keyring shows the helmet of what appears to be an ancient Greek soldier which would suggest that ancient Greece will be the setting for the follow up to the ancient Egyptian setting in Origins.