peterson has been banned since september 17 after child abuse case involving his four-year-old son and a switch .
he played just one game for the vikings last year and was due to be reinstated on april 15 .
but the nfl have moved that date forward and the 2012 running back will know more about his future .
the vikings have repeatedly said they want to keep the 30-year-old , who is due to earn $ 12.75 m this year .
but the cowboys and the cardinals have been linked with peterson , and the former have made some intriguing roster moves to free up cap space .