I kinda thought it was set in Moscow, guess I need to read the FULL title
Yeah, I like this, its a good idea. I like the fact that you'd be working for the russians. I felt that in IV you didn't work for the russians for all that long. Niko should have had some more missions for Faustin before getting double-crossed IMO. So this DLC idea would be a good counter-point to that. Also being able to view what happened before Niko's story might be interesting.
Mafia Wars New Feature: Properties and Safehouses Updated Silenced Pistol Icon
MOB: The kidnapper who was killed in IV didn't really look like the kidnapper in TLaD, so I'm going to retcon it.
Alot of people's appearences were changed in TLAD and TBOGT.. Not only does that guy get killed but he is a complete and utter ashole. I would say that you should just use Andrei's already existing model and build up a personality for him (since we know very little about him) or try and find a new model to use. The less confusion the better in my view.