Season 2 ended with Jim Gordon and co. capturing Hugo Strange, but they could not prevent the busload of Indian Hill escapees from flooding into the streets of Gotham City.
When we pick things up in season 3, Jim Gordon will be operating as a bounty hunter, while the GCPD will have their hands full tracking down all the new villains in Gotham.
But it appears from the promo that with Barnes back in action, Bullock has no problem getting back to the streets of Gotham.
Gotham returns this fall for its third season, which is shaping up to be its biggest season yet.