Last year, amid a nationwide tour celebrating the 35th anniversary of Home Alone, Macaulay Culkin shared an original idea he had conceived for a sequel. “I’m either a widower or a divorcee. I’m raising a kid and all that stuff. I’m working really hard and I’m not really paying enough attention, and the kid is kind of getting miffed at me, and then I get locked out,” Culkin explained. “My son won’t let me in,” he continued. “And he’s the one sett…