Quick heads-up: the other 2 screenshots have been added to the Rockstar website. They aren't new images, just "official" versions with the GTA V logo in the lower right corner.
* The one featuring Michael riding his bike towards the Vespucci Canals.
* The other Vespucci Beach boardwalk image.
They've been added to the first page, so they are out of sequence compared to the order in which we first saw them.