This tweet and this one from Ubisoft look like cave paintings as the publisher/developer goes into tease mode to get our juices flowing for some unannounced project. They also offer this tweet with an animated version of one of these images and a live stream that as of now is like watching cave paint dry. They will surely get around to telling us more in due time, but Kotaku will have none of that, saying this is all to tease a game called Far Cry Primal that's set in the Ice Age, saying they've learned this "sources familiar with goings-on at Ubisoft." By way of NeoGAF they say the title has been confirmed by a leak from IGN Turkey.