Interesting. So after some 15 years, we´re finally gonna get that big open Sicily level in a Mafia game after all 
Two things I´m wondering from the teaser:
- The fact that they use the ´The Old Country´ subtitle instead of calling it Mafia IV - does this indicate it is a sort-of spin-off rather than a mainline game? (also, why is the font different again?)
- If it´s going to be set entirely in the early 20th (or maybe even late 19th) century, there will be very minimal if any presence of cars (even if it´s the 1920s, I wouldn´t expect to see more than a handful in Sicily). How´s the open world traversal going to look like? Or have there been any rumours about it jumping between two different timelines? Edit: Just noticed on the game´s Steam page that there is a screenshot featuring a car. Still, I expect them to be few and far between.
Either way, I´m rather excited for this one.