The NFL postseason is upon us, but there are 18 teams who will not be participating, which means there are 18 franchises (and fan bases) already focused on the future. Here are some key dates going forward before we get to the draft in Detroit (April 25-27): — Jan. 15: Deadline for players with remaining eligibility to make their draft intentions official. — Feb. 1: East-West Shrine Bowl in Frisco, Texas — Feb. 3: Senior Bowl in Mobile, Ala. — Feb. 11: Super Bowl LVIII in Las Vegas — Feb. 20-March 5: Franchise/transition player designation period — Feb. 27-March 4: NFL scouting combine in Indi…