David Zaslav has a simple message for Paramount Skydance chief David Ellison: Get serious or go home.

The hard-charging Warner Bros. Discovery CEO has relayed to Ellison, who reportedly has been floating a lowball bid of around $20 a share and suggesting he might go hostile – that he needs to put up more money, possibly upwards of $30 a share to close a deal, The Post has learned.

Ellison, just months after he purchased Paramount in a deal valued at $8 billion , is expected to finally make an official offer for the company in the coming days as opposed to the soft expressions of interest that have been reported in recent weeks, sources said. 3

But the 42-year-old son of Larry Ellison – the Trump-backing software tycoon who recently became the world’s second-richest person – is

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