David Ellison’s company has written David Zaslav’s company a sternly worded letter. Photo-Illustration: Vulture; Photos: Rodin Eckenroth/FilmMagic, Rodin Eckenroth/WireImage Another day, another stressful development in the battle for Warner Bros. Discovery. Paramount Skydance sent a strongly worded letter yesterday to WBD CEO David Zaslav claiming “that WBD appears to have abandoned the semblance and reality of a fair transaction process.” The letter alleged that the process had been “tainted”