He later went on to answer questions:
Release date: November 2013
Platforms: PlayStation 3, Xbox 360, Wii U, PC, 3DS, PlayStation 4, and Xbox Infinite.
"All seven versions will be the same, except the PC, PS4, and XI versions will have higher resolutions and the 3DS version will be made by a different team. Do not worry, it is not going to be Dimps. Sega has ended their relationship with them."
Wentos is a SoJ leak that browses 4chan's /v/ from time to time and leaks info bits on Sonic games. He has leaked every Sonic game since Unleashed several months before ANNOUNCEMENT.
This leak is by Wi
ntos. Though the name is different, his tripcode ( !!Vp9lMh6KQfP) matches one he has used before.
Here's some proof with the same tripcode (notice the date of the leak as well):
What do you guys think of this?