Kate Rockwell returns to the Off-Broadway revival of “Heathers” at New World Stages, reprising Ms. Fleming and Veronica’s Mom beginning January 26. The casting update ushers in Adam Bashian, Jimmy Ray Bennett and Thalia Atallah, with Peyton List stepping in as Heather Chandler the same night. The changes follow final performances by Kerry Butler and several supporting cast members, marking a new chapter for the Kevin Murphy and Laurence O’Keefe musical. Directed by Andy Fickman and led by Kuhoo Verma and Casey Likes, the revival continues its run with a refreshed company and the sharp-edged energy that has kept “Heathers” resonating with audiences.