The author of 'Heated Rivalry' has delayed the release of their next book, with some outlets reporting the title as 'Unrivaled'. The delay, now pushing the release to 2027, is attributed to the author's health, specifically Parkinson's, as well as their personal life, though the exact reasons cited vary. The book is reportedly part of a series, with some sources referring to it as part of the 'Game Changers' series, while others mention a film adaptation of 'Heated Rivalry' also expected in 2027.