The only thing I could possibly think of that might justify not having it is, well two things actually:
1) avoiding consumer confusion over too many skus
2) banking on hype to make more money
I agree that they should have something like that with a demo disc of sorts. Maybe like one or two sports games, drawing, and like, a tower defense game.
It's also possible that it is scheduled to come out, or, they made a deal with retailers to offer a discount if sold with a game and put the ball in the retailers court on what to package it with.
Might be something stupid too like supply constraints on the games themselves.









