Dubois really needs to have a big season (and stay healthy), if he wants an interesting salary increase next summer, as he will be a free agent, after signing a one season contract. (A pretty risky bet)
Dubois, 24, had 60 points and 28 goals in 81 games last season in Winnipeg. With a big season, he could indeed command a very interesting salary increase.
If the injury is serious, it would be very bad news for him, but let's wait and see. In any case, his presence for the Jets' season opener is definitely in danger.