It's clearly Heavenly Sword the guard that are in the background are the same guards you fight hundreds off in the game
If you read the article, you'd would know the author confirms it.
By the way, has anyone thought to look at the filenames for the character screenshots? They actually show the names of the moves they're using. For Kat we see "Gravity Attraction", "Gravity Dash", and her Level 1 Super. For Emmett, we see "Rocket Grenade" and "Shotgun Mine." And it looks like the stage is going to be called "Fearless."
EDIT: musicfreak beat me to it.