Featurettes and mini-docs coming just before or alongside game releases aren't rare. They are more or less a part of pre-release materials nowadays, offering insight into aspects of a game.
Ubisoft are offering something different though. It's been announced that to go alongside Ghost Recon: Wildlands, the publisher are producing a feature length documentary on the Bolivian drug trade, which the game is based on. It's called Wildlands and will talk to several people very familiar with the inner workings of the trade.
The documentary will release on March 6th, and to get you caught up, here is a trailer: