According to the developers, they're aiming for realism and work in cooperation with the real Dakar drivers and riders. (Then again that's what almost every racing game developer always says.) And supposedly the stages should take between 1-2 hourse to complete.
I've already said it elsewhere today - I have very mixed feelings about this. It would be great to have a realistic Dakar game, but currently, it all gives off too much of an arcade game vibe. I'm kinda expecting something along the lines of SLRE at this point - a game that has a great foundation for what could be a great sim, but packaged in a way to appeal to a more general audiences (especially since it's also coming out for PS4 and Xbone), with the two parts not really fitting together and clashing in a way that's just discouraging to a majority on both sides of the fence.
Also - and I've also mentioned it elsewhere - the "1-2 hours per stage" sounds great in a way, but also incredibly demanding and I kinda can't imagine anyone but really hardcore Dakar fans to find interest in that, at least unless there's some kind of saving or checkpointing system implemented. I really don't think there's mass appeal in a game where you're expected to drive for an hour or two to finish a stage.