Only a few days ago, First 4 Figures announced the all-new Sonic Diorama Collection, starting small with City Escape from Sonic Generations! The set includes Classic Sonic launching off a ramp on a skateboard and Modern Sonic on a makeshift snowboard. But now the set is available for pre-order! Here's the product description:

Over the years, Sonic the Hedgehog has seen himself in a plethora of sensational adventures and breathtaking locales.
First 4 Figures is proud to unveil an entirely new line of Sonic the Hedgehog collectibles: The Sonic Diorama Collection. The collection will celebrate iconic scenes from Sonic's amazingly diverse history from unforgettable stages, and historic moments from the games themselves.
The first in this collection is City Escape. Originally seen in Sonic Adventure 2, then completely re-imagined in Sonic Generations. The scene depicted in this diorama features both Modern Sonic and Classic Sonic boarding their way down the streets of the famous city escape stage. Modern Sonic is on his snowboard, tearing up the asphalt whilst Classic Sonic is launching himself off a ramp on his skateboard.
Comes in deluxe full colour packaging with molded foam interiors, and includes an authenticity card which allows you to secure the same model number for future pieces in the Sonic Diorama collection.
Being the first in this new line, the lowest numbers will be available to those who pre-order earliest, so don't delay if you wish to have the best chances of securing a low number!

But what's this? an exclusive edition?

The exclusive edition of this diorama allows the sparks from both Sonic's Boards to flicker. In addition, the ramp Classic Sonic is jumping from also has been illuminated, in keeping with the ramps from the game.

The main product costs $299.99 and is limited to 1000 pieces worldwide, while the exclusive edition is limited to 450 and costs $329.99. To order the diorama, see this page, or this page if you want to go an extra $30 for the exclusive edition.

Want a look at the Diorama itself? Here you go!