60 players online? With objective-based gameplay that emphasizes teamwork? I don't know about this. It's hard enough to get three other people on the same wavelength in Gears of War. With 29 other players on your team, it'd take a miracle. Hopefully it all works out, though, because that would be epic.
The idea of two different campaigns is really interesting, but even moreso is the mention of bringing back boss battles. Yes, please!