Warner Bros. Discovery Chief Executive Officer David Zaslav needs a win. Soon.Since merging Discovery with WarnerMedia in 2022 and immediately slashing billions in costs, Zaslav has struggled to convince shareholders that his company is a worthy investment.Warner Bros. Discovery shares have fallen about 70% since April 8, 2022, the day the merger closed. His tenure has been defined by implementing thousands of layoffs, cutting movies and TV series for tax efficiencies, killing off CNN+ a month after its lau ...