The other two will actually be brand new maps that the players themselves can vote for via the Bad Company Website. These two maps will be made from sections of the single player campaign. Voting ends September 2nd, and the two maps with the most votes will be featured in the upcoming update.
The maps are said to cost 4000 Microsoft points, because EA thinks that they are worth it...Wait...They're Free!? Wow, I guess EA is trying to make up for that extra 10 dollars everyone spent to get the crappy extra guns Now I just need a copy of Bad Company...