Originally Posted by Mr. Wooden Alligator
Weren't the Chechen, Gambol, and the others at Maroni's meeting mob bosses? The fact that they were willing to pool resources to survive Batman's war shows that he was booking it between BB and TDK.
When they "sprang the money trap", it wasn't clear how much of the mob had been still left intact - two bosses dead, one injured and possibly dead, with a bunch of successors or maybe competing organizations ready to fill the void, so probably was still some work to do.
That kind of left it open both for a "still fighting the mob" scenario for a sequel, as well as the "well yea they finished the work without much further trouble" they went with eventually.