The ESRB has let some tiny bits of info slipped about Sonic 4, problem is that it just sounds like classic Sonic, which sounds very good.
This is a side-scrolling adventure game in which players zoom through themed levels, collect gold rings, and jump on tiny robot enemies. Players earn points for collecting “power-ups” and freeing tiny animals that are trapped in the robots.
During boss battles at the end of levels, players may encounter an arch nemesis in a mechanical device that gets charred and emits some flames when damaged.
Freeing tiny animals? Sounds good to me.