As i recommended in the last year, i could imagine a Tour mode like FH has it. But i would like to see it more specific.
For example. Let us join into different racing series (GT, Formula, Touring, and more) having a choice between many, but equal setted cars, driving a series of 3-5 races. (there can be short, medium and long series choice) and people are driving these races.
Of corse, this can work with pvp, or team-modes as well.
With thematic iconic and realistic championships (North America Indy series for exmample), it could be a lot of fun, especially those having not the right hand for settings.