Believe me we are contacting the developers daily for information for you.
Bottom line is the PC version will be as close as possible to the console versions, it will share the same modes/ maps and have matchmaking.
There is a thread stickied with information about the PC version detailing the enhancements and you can read them
here, there isn't much more information we can give you at this moment. Of course when we do have more information we will post it.
However, I am trying to get more screenshots, trailers and answers to your questions for you.