Its not too far fetched to say there will be more regular players of Halo 3 multi-player than LTD sales of the Conduit.
Really, is this all a stupid comparison. You do know that Halo 3 is lauded for more than multi-player, they've won awards for their AI etc as well. A great developer can make a great looking and playing game, and Bungie is one of those developers, one of the best at that.
Tease.