I think I found new info:
"There is a number of events in the game that are coop and team-based, letting you compare scores between teams of friends, not just individuals. One such event was called Follow the Leader. Here, we started off without a path marker, as only our partner could see where the next checkpoint was. We had to follow, but once we reached the race checkpoint, our partner’s map was cleared, and now we could see the next destination. This type of coop racing seems like a fresh idea in a tired genre, and things will get really interesting when 8 players are involved, and the next checkpoint keeps cycling between the players’ maps."
Source: http://www.newgamenetwork.com/article/275/tdu-2-preview-e3-2010/