Guys if it was one of the big hitters for the 360 I think the wording would be a little diff to what they used. If it was something like mass effect or l4d I think that they would have used the wording that was more impactful than popular like "one of the 360s big hitters" or something like that.
If it was a game that has a sequal than they would use the word franchise.
I think that it really wont be any of the "big ones" more like a game that just sold fairly good on the 360. I think more than anything they were careful to word it so that there site would get hits but not get to much of a backlash when the game is revealed and it isnt one of the big titles.