As soon as there is the mere perception of a rebound in the piloting profession, the amount of training will skyrocket to MORE than cover any retirements. The data on retirements shows that it will be at least 5-10 yrs before they really add up to much. Thats plenty of time to enroll in the aviation college of your choice and be ready to take any low-paying regional or CFI gig that MIGHT be available.