While nothing has been announced yet it’s likely that the Lamborghini Sian will be in Forza Horizon 5.
Since the release of Forza Horizon 4 Lamborghini has released two new models: the Aventador SVJ and the Sian.
It’s highly probable that both of these models will be available in Forza Horizon 5.
Additionally past models from Lamborghini have typically been included in later versions of the game so it’s likely that the Sian will also be included in the game.
How Do You Get The Lamborghini Sesto In Forza 5?
Watch this video tutorial on how to get the Lamborghini Sesto in Forza 5: