Gotham has filled their fist villain slot by casting James Frain (The Tudors, Orphan Black) in the series-regular role of Theo Galavan, brother to Tabitha Galavan, who may be better known as "Tigress".
Theo is a heroic billionaire industrialist who’s new to the city, and Gotham is happy to have him. But his philanthropy covers a centuries-old vendetta, and he and Tabitha — to whom he’s very devoted — have violent, chaotic plans for the city they’re planning to destroy. The role of Tabitha has not yet been cast.
The Galavans’ introduction eventually will lead to the destruction of some old villains and the creation of new ones.