Honestly, this is the closest I'll get to Team Fortress 3. Additionally, it improves on TF2 by quite a lot. I miss the large amount of classes, but the different body types and large variety of customization and customizable weapons more than make up for it.
Edit: Not that I expect it to be TF3. I just love TF2 and in my opinion, Brink is the perfect successor to TF2: teamplay, classes, body types, customization, large amounts of weapons and the players won't be obsessed with hats. What's not to love?