Nothing has been announced regarding that, but the community already has a working backend with Project Rome if it goes down. BC2's community is still fairly active, so I don't think they'll be touching it for a little while longer, but it's always a bit of a toss up with EA.
In the Audio settings under Voice, there are options to enable either the male or female announcer or just turn the announcer off all together.
I do believe you'll need the modding tools for Project Rome to do that, I don't believe that's a feature in the vanilla game. You can find the documentation for Rome here: forums.veniceunleashed.net/bf/index.php