If you had to write the sequel...
..how do you think Warren Schmidt's life would go?
I think he'd sink into isolation, depression, and alcohol, and when he bottomed out, he would venture into some local spheres of activity, and some enterprising widow or divorcée would bag him. If he was lucky, she'd be a warm, loving woman with a big family and wide circle of friends. He would get pulled into a happy home life, and die a loved and contented man. On the other hand, if his loneliness made him desperate, he could let himself be bagged by a difficult, maybe crazy woman, or possibly an alcoholic, if he met her at a bar. Then he'd sink deeper and deeper, until he finally died.