A Commercial Jingle For Regina Comet **1/2
By: Samuel L. Leiter September 27, 2021: It takes a lot of chutzpah for a show to announce beneath the title on its Playbill cover, almost as a subtitle, "A New Musical Hit in the Making." This is, after all, a city where the "h"-word rightfully belongs to works of creative genius, like Come from Away, Hadestown, and Hamilton, to name a few. In the case of A Commercial Jingle for Regina Comet, though, with its six…