A full-size saloon from luxury marque Obey is due to appear in Grand Theft Auto VI, seen in grey and black in Vice City's Stockyard neighborhood in the first trailer, parked along a thoroughfare in the second, and clearly badged in an official website screenshot. It appears to be based on the second-generation Audi S7, with headlights that seem sourced from the Škoda Superb (B8).
Vehicle data via GTA Wiki (Fandom), CC BY-SA 3.0.