Waitwaitwaitwaitwait...
So the chubby and lovable Sonic from the 90's is different than the current and "cool" skinny Sonic!!??
In fact, the plot is something about time travel and... a monster called TIME EATER.
Also, I've been watching some trailers and, man, thats some good stuff. I've seen a comment on a youtube video that express what I'm feeling:
"Holy s***, Childhood? Is that you?"