Billionaire investor Mario Gabelli still has not decided whether he'll mount a legal challenge to Skydance Media's merger with Paramount Global. Gabelli is the founder, chairman and CEO of GAMCO Investors,

Gabelli requested the delay so that he could probe for “potential fiduciary and/or federal securities violations” against Paramount’s minority shareholders.

Longtime Paramount Global shareholder Mario Gabelli, who had agitated against iterations of the Skydance-Paramount merger deal, is stepping up his campaign for more transparency around the deal. Lawyers for Gabelli,

The letter comes after the GAMCO Investors Inc. chairman filed a books and records request seeking more specifics about the $8 billion merger deal