Did Gotham Just Reveal Its Most Dangerous Villain?

Gotham has finally returned to the airwaves after nearly three full months of hiatus, and the midseason premiere was a wild ride that introduced Ivy 3.0, reunited Jim with Lee in most unexpected circumstances, saw Butch regain his wits but keep his swamp body, and featured a toymaker/assassin. The episode may have also revealed which of the many Gotham rogues is the most dangerous at the moment, and it's not one that we might have guessed prior to this premiere. The most dangerous villain could very well be Ed Nygma.