In the interest of full disclosure, I have Bradshaw as a 6th round pick in a keep-6 league and am willing to move him for just about anything right now.
Obviously a lot depends on what happens between now and the end of the year. If the knee turns out to be no big deal and Bradshaw remains (relatively) healthy for the rest of the year, he won't lose his position as starting HB, though I think our dreams of Bradshaw ever seeing 70% of the carries can rest in peace. If Bradshaw is gimpy or really hurt and Wilson comes in and shines, then I believe it is a full-blown RBBC for 2013. Andre Brown has at least carved out a short-yardage, goal-line situation for himself as well.
Best case scenario for Bradshaw is Wilson fumbles and/or looks pedestrian while Bradshaw remains productive. If this occurs, I believe the Giants have about a 60/20/20 split between Bradshaw/Brown/Wilson next year.
If Wilson plays well or Bradshaw can't go for the rest of the year, I think we are looking at a worst case scenario in 2013 of a 40/30/30 split between Wilson/Brown/Bradshaw. Bradshaw will still get third down work and some passing situations where Wilson screens and swing passes aren't in the game plan.
60% of the Giants ground game with smaller goal-line involvement may make a mediocre #2 RB in PPR. He's up to 1100/8 with three games to play, so if he can go a season of 1300/10 isn't outside the realm of possibility, but this probably represents his upside in 2013.