It would admittedly rely heavily on nostalgia (which isn't always a bad thing). But I think it would be "different" in that the economy, for one, would be reset ... and getting gold to buy things like mounts (at level 40) become more meaningful experiences. Events that were one-time only could be redone. It's a lazy man's reset ... like rereading a good book. Or playing Zelda OoT again.