You should be fine for most schools. There are only a few schools that require the new 2015 MCAT for the upcoming application cycle. In the case you had to reapply, I would probably schedule the MCAT for later in the season (spring 2017). You don't want to invest all that time and resources into studying for the MCAT since it might be unnecessary. I would probably start prepping in early February if you didn't have any interview invites at that point, since February is nearing the end of the interview season for a number of schools.