There will be one game. It will have every vehicle. Ever. It will model everything. All data will be correct. It will be available in every language. On every plaform. All will be online compatible. There will be one game world. It will have every track. That every has been, is, or will be. Every town, city, road, river, everything. All there. Drive from track to track. Take boats across the ocean. Run pedestrians over. Get out on foot and sit in the grandstands. Or walk to the hot dog stand, steal some food, get chased by the guards, take them out with your machette, then take out the TV helicopter with the rocket launcher you stole from the army barracks a day before, before stealing a rally car and completing the Paris-Dakar rally. Awesome sauce.
Oh, and it will be bug free.