No. People have weird beliefs about what fiduciary duty means. It does not mean that companies are required at all intervals to maximize revenue or profit.

Dunno - is protecting yourself from high-profile criticism by doing whatever you want with assets you 100% own and are under no contractual obligation to share ... also in fiduciary duty?

It is not illegal to be petty during business negotiations.

the easy argument otherwise would be that if they sold the IP, they wouldnt be able to revive it in the future, and also they would have nate silver as a competitor in the space

Nope. There is really no case law to support such a legal theory.