But jokes aside, this is probably much more than a little teaser and given that it is in good hands I'm sure you are correct that it's well on the way to completion :)
The game's troubled development is probably documented better than the Titanic by now, but FWIW there were a number of points in development where the final product was playable, but didn't get out to store shelves for one reason or another. A few leaks of those various builds actually surfaced recently, and a lot of people found pretty reasonable grounds for the game's development restarting. One of the alpha builds even used straight-up porn as a placeholder texture... I empathize with the project manager(s) of Duke Nukem Forever.
But jokes aside, this is probably much more than a little teaser and given that it is in good hands I'm sure you are correct that it's well on the way to completion :)