Forza’s Furious 7 DLC will be a standalone so you do not actually need Forza 2 to play. The Furious 7 DLC will also be free to everybody from March 27th until April 10th as promotion for Furious 7.
Forza Horizon 2 Presents Fast & Furious – a standalone expansion. Drive some of your favorite cars from the Furious 7 movie FREE for a limited time, starting March 27th. And check under the hood as we go behind the scenes with Furious 7s car expert, Dennis McCarthy.