Considering the "Beans Bullets and Bandages" achievement, and that I still find many active online games, I don't think EA will close down BF BC anytime soon. I can't necessarily say the same with BF:BC2 where I found many empty servers.
So I don't think I'd fret too much yet. Just devote time to playing and maybe you'll get the needed 10002 kills.
Best of luck to ya.