Arena Mode = Short round time, single life, 2 teams, win by killing the other team or completing the objective... sounds very based on CS to me.
I love CS and I love TF2, but Id rather they stayed seperate and played to their strenths. This strikes me as a bit of a mish mash of the 2... I mean, Engis and Medics become useless, ull be dead before you can build anything or charge an uber, unless theres a spwan time, which would be pointless. Wait around for 60 seconds, run out, get shot, die, round restarts, wait for 60 seconds....
Im not holding out much hope... but we shall see.