In last week's episode of "Gotham" Season 3 entitled "Mad City: Blood Rush," the righteous Captain Nathaniel Barnes has turned into a villain after killing and dismembering a suspect who turned out to be a "cleaner" for a hit in Gotham City. Barnes transition to evil started when he came into contact with Alice Tetch's blood, which favorably gave him strength, but also made him lose control of his mind. He started to hear voices ordering him to kill anyone in Gotham City which he finds guilty.
It was speculated at first that Barnes will turn to Bane in the upcoming episodes of "Gotham" Season 3, considering that Barnes started to gain strength along with uncontrollable rage after Alice Tetch's blood infected his eye. This is somehow similar as to how Bane gained his super strength, when he was subjected in an experiment in Gotham prison, and was injected with Venom, as noted from ComicVine.
Another theory is that Barnes is going to shift to be The Judge, given that Barnes is the captain of the Gotham City Police Department, and was quoted saying that he is the 'judge, jury, and executioner' in previous episodes of "Gotham" Season 3. Michael Chiklis, who portrayed Barnes in the series, stated that "Something changes the dynamic entirely in his own self, and his own body, and his own mind. And that changes everything for him (Barnes), inexorably" according to an interview from Blastr.
There is yet a third villain who is being linked to Barnes shifting character in "Gotham". In an article from Fansided, it is possible for Barnes to transform to Bad Cop. As with Barnes, Bad Cop started out as a good police officer in the Gotham City Police Department. However, things changed for him when his wife committed suicide after being lulled to it by The Joker. Ironically, if Barnes turns to Bad Cop, he and Jim Gordon (Ben McKenzie) will become archnemesis in the latter episodes of "Gotham" Season 3.
The plot continues to get twisted as Barnes try to get control of his thoughts. His beliefs and moral stand on putting criminals behind bars for a fair trial now backfires as he is now compelled to kill anyone who he thinks is guilty in Gotham City. Who do you think will he turn to? "Gotham" Season 3 is now ongoing with the upcoming Episode 9 on Nov 14, 2016, 17:00 ET.
