For the last few hours Ubisoft has been teasing a new project with a livestream of a cave painting, and it's now believed that it's for a spin-off entitled Far Cry Primal.
In Ubisoft's most recent tweet we can see a 15-second video of the cave painting emphasising combat with mammoths and bears using bows and spears. The IGN Turkey image suggests that there's a couple of factions at war and clubs will be a new weapon too.
A previous tweet teased the tagline: "survival is timeless."
It's unclear if Far Cry Primal will be a full-priced adventure, DLC for Far Cry 4, or rather a smaller standalone spin-off, as 2013's Far Cry 3: Blood Dragon was before it.
We've asked Ubisoft for confirmation about Far Cry Primal and will update should we hear back.