Assuming success with the Green Hill Zone Loop playset...
Here's another play set for the small line 2 inch figures, and it's the boss of Sonic 2. This whole thing doesn't exist at all, it's just a CG box mock up of what they want it to look like. You can see with the illustrations there that it'll come with some kind of launcher and a 'spinning Sonic' figure so you can launch him at the boss, which will cause some kind of action to happen on it. Maybe it has pop-apart pieces or a breakaway panel to create boss battling action.
If this is done well, it's a good idea! This boss hasn't been represented in toy form yet.