The Forza Garage has been opened again for announcements of the car that'll be found in Forza Motorsport 7. So far the announcements have not featured many new cars, but instead covered a lot of cars that are in FM6 and FH3. Because the game will launch with more than 700 cars, there are lot of cars to go through, which means that I'll mention the new ones.

Week 1: https://forzamotorsport.net/en-us/news/fm7_forza_garage_week_1

The list features a couple of interesting Porsches: the 1993 928 GTS is new, the 911 GT1 Strassenversion returns, and the 2017 919 Hybrid Le Mans prototype is added. There's also a couple of Ferraris you might like: the 1989 F40 Competizione returns, and we also get the 1996 F50 GT that's in FH3.

Week 2: https://forzamotorsport.net/en-us/news/fm7_forza_garage_week_2

The 1967 Volkswagen Karmann Ghia returns to Forza Motorsport (and yes, that also means that FM7 has Volkswagen cars in it), and the 1950 Alfa Romeo 158 arrives.