That looks tasty. If it has all (or a bunch) of the DLC stuff in it too, I may consider trading down my copy of GoW2, and grabbing this, instead of keeping my GoW2 and buying a new GoW1 to complete the collection. This way would seem more viable.
Don't expect to see any Gears of War 3-related content, though. The representative confirmed "it will not involve Gears of War 3 or the beta." You'll have to pick up Bulletstorm instead if you want entry into the beta.