Sounds reasonable in many respects. But, that puts it up against Battlefield, and it really takes a dump on Forza, which is having a phenomenal launch of its own.
I'm betting against it. Maybe there will be a open beta or something that starts on Monday and runs for a couple of days, but I just can't imagine a full launch (even of just the PvP) for a mega huge game like Halo coming out of nowhere like this.