Final Fantasy XV's most iconic vehicle (Regalia) is coming up to Forza Horizon 4. The motor appeared in the last game as well, so the tradition keeps going.
Regalia will be available in two different forms - D-Type and Quartz. While Quartz is the default option, D-Type is a good choice if you want a great monster truck makeover.
Both forms of Regalia will come up as rewards in the Season 6 update of the game. And no, you won't be able to fly, but it's not like you expected it, right?