Judging by the trinket in the picture, it looks as though we'll be heading to ancient Rome or Greece in the next adventure. This lines up with how Assassin's Creed Origins concludes, so it seems that Odyssey will be a direct sequel to the well-received Egyptian entry.
We don't know any more than that at present, but this will almost certainly feature heavily at Ubisoft's E3 2018 press conference. You can find out when it's taking place by clicking here.
What do you think about Assassin's Creed Odyssey? Guide your arrow down to the comments below.