Well I know they will have a medic in the Omaha level. Check out the official page showing the WW2 medic who helped out by telling what a medic would say.
please no medic packs, god how I hate medic packs. But now that I think about it since it is just a game FPS and not a sim FPS then there will probably be medic packs. Oh well it's gonna be a great game.