Former New Jersey Nets owner Lewis Katz and cable TV mogul H.F. "Gerry" Lenfest say Publisher Robert "Bob" Hall was not authorized to fire Marimow on Monday and did not consult them.
The lawsuit, filed Thursday, comes as their rift with co-owner George Norcross - an influential New Jersey Democrat - over Interstate General Media's direction grows more public. Norcross' daughter, Lexie, runs the company's Philly.com website.
The lawsuit seeks Marimow's return and Hall's ouster. It alleges newsroom morale has plummeted. Current and former staffers have also signed an online petition to support Marimow.
The local investors' group bought the media company in April 2012 for $55 million.
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