It's a good thing T10 has been building up its library of cars since FM5, including past cars and giving them Forzavista levels of detail like the new ones added (such as engine bays, interiors, and other components on the cars).
However, we can't have another GTS situation where T10 has to annihilate all its content and add them all back in later as DLC. Plus, I especially don't want another esport title. What I want most from T10 is keep improving the formula, add more new features, cars and tracks (especially tracks such as city courses), and rallycross for off roading vehicles. I can live without seasons because it will probably be selectable for certain tracks, and no one wants that (me included). So instead, work on dynamic time/weather and day & night cycle.
Continuing on with tracks, I want to see not only new tracks, but also returning ones like Camino Viejo de Monserrat, Rally di Positano, etc. Oh, and we can't forget about Dirtfish - that be good for a live stream!
Currently loving that T10 is fixing the online side; continue with that, and FM8 will be gold for most, especially for Forza RC for competitive racing. FH4's online has been really clean thanks to the new penalty system (it's a little harsh, but at least it drove away the rammers.) FM7 needs to be next.
Overall I'm happy with FM7, and adding more to it will be icing on the cake. The better it becomes via updates, the stronger FM8 will be at launch.
Please add Rallycross in the next game T10! 👍