I think.

Remember that guy at the start of the game, Bulgarain, and he tries to kill you in that warehouse along with Little Jacob. During that mission i can't remeber if you actually kill him. Anyway, after that mission you never hear of him again until way later until the diamond thing, and i don't think you kill him there either.

So, i am betting that because you killed Dimitri, Bulgarian is gonna try and kill you.

Thats wot the DLC will be i think.

Please note, i am not sure if you actually kill him because i can't remeber but feel free to correct me.

"Following the story line's completion the Police database lists Bulgarin as dead, although no details are given, however Dimitri may have had something to do with it."
So I think Dimitri killed him...

From: http://gta.wikia.com/wiki/Rodislav_Bulgarin

Quite possibly. The police database lists Bulgarin as being deceased once you complete the story, but he's taken out so abruptly that it really seems like a loose end.

So he did die? Damn I wanted to do it...

No its GTA SA Map :P, Whats up CJ