My theory.

The old guard got sick of Sicilian leadership; and decided to have Cali whacked. Think a few old timers; along with the blessing of the Corozzo's and maybe Marino. Nick Corozzo gets out next yr so perfect timing for him to use a proxy aka Acting Boss. As someone mentioned; Take back leadership from the zips.

I doubt Gene had anything to do with this. He may have been consulted but who knows? The gotti name doesnt pull weight anymore.