Sonic the Hedgehog 4: Episode II

Sonic the Hedgehog 4: Episode II is a 2.5D platformer for next-gen consoles, and marks the 2nd episode of Sonic the Hedgehog 4 and is currently under early development. It's been said to be released on May 16th of 2012, but it's unsure which region(s) it's being released in on that day. It was announced saying it will have new zones and bosses and many other things we haven't seen before, plus it was said that thanks to the sales of the prior game, the game will likely have a bigger budget. It is tied into Sonic CD in an unknown way, but Sonic CD is defined as the game's spiritual prequel. There will also be a new physics system in the game since Ken Balough said fans gave bad reviews over the physics in Sonic the Hedgehog 4: Episode I as well as a brand new graphics engine.

Story
As seen on Sonic 4 website:

The fierce battle from Episode I was only an overture… What was Dr. Eggman searching for in the Lost Labyrinth? What was Mad Gear built for? They were all a mere puzzle piece of a grandiose project schemed by Dr. Eggman. As Little Planet, where “Sonic CD” took place, approaches Sonic’s world once again, Dr. Eggman’s whole scheme will be revealed!

Description
Metal Sonic has returned to form a formidable alliance with Dr. Eggman. To face this new threat, Sonic will have to call upon an old friend to help him save the day. Joined by Tails, they utilize ingenious combination moves and race across four brand new Zones, in order to put an end to their evil plans. Play alone, or with a friend locally (and online), in an evolution of Sonic 2's collaborative gameplay! Unleash Sonic and Tails’ devastating joint attacks and combination moves to fight the united force of Metal Sonic and Dr. Eggman. Episode II features an all new game engine, bringing you updated physics and an original graphical style as you race through four unique Zones and a new Special Stage from Sonic 2.

Playable

 * Sonic the Hedgehog
 * Miles "Tails" Prower
 * Super Sonic
 * Super Tails (possible)

Non-Playable

 * Dr. Eggman
 * Metal Sonic

Bosses

 * Egg Serpentleaf
 * Metal Sonic

Badniks

 * Spikes
 * Fullboar
 * Steelion
 * Scarabesque
 * Sandworm
 * Chop Chop
 * Snowy
 * Bubbles

Zones

 * Sylvania Castle
 * White Park
 * Sky Fortress

Gallery
For a robust of Concepts, Screenshot and more, please see: Sonic the Hedgehog 4: Episode II/Gallery

Trivia

 * This is the first game since Sonic & SEGA All-Stars Racing (or Sonic 06 in the mainstream games) to promote Tails as a playable character (not counting the digital re-release of Sonic the Hedgehog CD).
 * Also in creativity for promoting Tails, the art and styling for the game's beta box art represents Tails' two tails in place of the Number 2. This is also featured in the game's teaser trailer.
 * Also in the Teaser Trailer, Sonic and Tails performed a combined Spin Attack; which caused some fans to wonder if it in fact was a new move or not. With the recently released screenshots it is revealed that it is a move named Rolling Attack.
 * The color of Sandworm looks very similar to its iteration, Caterkiller.
 * This is the first Sonic game to promote Tails carrying Sonic underwater. The first to feature it was Sonic Advance 3 with Tails' mid air tag action.
 * This game celebrates the 20th anniversary of Sonic The Hedgehog 2. As well as the title card paying homage to said game (which is similar to Episode I which pays homage to Sonic 1), the Special stages are given a Sonic 2 style. This style of special stage was also previously used in Sonic 3D Blast, Sonic Pocket Adventure, Sonic Heroes, Sonic Rush, Sonic Colors (DS version) and Sonic Generations (3DS version).
 * One of the level screenshots strongly resembles the snowboarding segment from Sonic the Hedgehog 3 and Sonic Adventure, in Ice Cap Zone.
 * It appears that Metal Sonic has stolen the rocket Tails made, the one that is used to get to the Final Zone in Sonic 4 Episode I.
 * This game marks the return of Little Planet from Sonic CD..
 * The music in the 2nd trailer is a remix of the menu music from Sonic & SEGA All-Stars Racing.
 * Red Rings from Colors and Generations make a return, though what they'll unlock in the game has yet to be confirmed.
 * In the gameplay trailer the warning signs from Sonic Generations that mark bottomless pits are back and the image shows the Classic Era Sonic.
 * Super Sonic will be playable in ordinary boss fights, unlike recent games he has appeared in.
 * In Episode I people saw something on the right of the world map causing them to wonder if it was to Episode II. According to the world map of Episode II, it connects to Episode I.

Trailer
thumb|left|300px|Teaser Trailer thumb|300px|right|Gameplay Trailer