Well its development was a clusterfuck until Rockstar bought publishing rights and salvaged the project, turned things around and managed to release the game to, as last reported some while back, 5+ million copies. I know a lot of money was sunk beforehand due to McNamara's piss poor management, and I don't know how much Rockstar profited from the game, but it sold really well, especially for a new IP. If L.A. Noire 2 or N.Y.C. Noire or whatever were to happen, I don't think Team Bondi personnel would be needed, Rockstar can just get one of their own teams to make it. The only problem is that they won't be able to get hold of the specific mo-cap tech used before, so that special facial animation recognition wouldn't feature again, but that's hardly a deal-breaker. L.A. Noire was largely in the spirit of previous Rockstar games, so I could see them pumping out a sequel, sure.
And I hope so, 'cos I love L.A. Noire!