Look at the Microsoft games for example... its "always online" DRM was phased out a LONG time ago. Some of the companies have opted to update the game, that is if that company still exists and enough people complain. DiRT is an example of this, it originally used Microsoft Live and always on DRM despite being a predominately single player game. As of right now, theres still no update but... Supposedly that company is working on it.
Needless to say, If FD cant fund the online aspect anymore in the forseeable future... Id say they would just patch it so you can play offline. Or else we can all break down their doors.
However, the game JUST released, please do not expect the game will fail to deliver online mode in the next 5 years at the very least >_>. Look at games like SWTOR for example... that game died in the eyes of MANY yet it still functions with the few that still love it.