The "General Games Chat" forum, which includes Retro Game Reviews, has been archived and is now read-only. You cannot post here or create a new thread or review on this forum.
There is also a load of rumours about another collection of older Sonic games, this time featuring Sonic CD, Sonic The Fighters, etc.
There is probably a new Sonic (not Shadow) game under construction too, but for more information on future Sonic games, you may need to wait for E3.