Ah, LEGO, I can't stay mad forever. I still think you do us wrong, but I'll relent for now (I know, you were scared there for a bit, weren't you?). Here are some of the official releases and displays related to the Turtles theme. A lot of this is probably review if you read LEGO blogs, but I'd like to put it all in one place.
Lucky NYCC invited guests got an exclusive
Pizza slice promo:

Arriving at NYCC, you initially saw some
covered signage and an inviting blank LEGO wall:

Eventually the cover was removed and the rumors and speculation were confirmed, it was an
official LEGO TMNT theme:

And what about that blank LEGO wall? Attendees could construct
small mosaic sections:

As these got added to the wall, an
image soon appeared:

Over the course of NYCC, the
final picture was revealed:

As you know, LEGO showed off the first set of the line,
79104, Shellraiser Street Chase:

They also showed off the
figs:

They also had two giveaways associated with NYCC. Darkdragon scored a
black turtle as part of a raffle at the NYCC site:

Ultron32 somehow got three of these and two of the
Krang figs that were given out at a nearby LEGO Store:

Since NYCC, photos of
two other sets have shown up online. In addition, Brickset
two additional sets, Kraang Lab Escape and Shredder's Dragon Bike.
The two other sets with pictures are
79102, Stealth Shell in Pursuit:

and
79103, Turtle Lair Attack:

Okay, that's it for Turtle news for now.