Is chain of memories....

I know it's probably way too soon to know, but the screens make it look like Chain of Memories is actually a re-hash of KH with a new combat system (GOTTA CATCH 'EM ALL!). The characters and worlds all seem the same, even though (SPOILER)these worlds were all separated by impenetrable walls when kingdom hearts was re-locked. Anyone know what's going on with that? Or would it all just be speculation and rumor mongering at this point?

Chain of memories begins right after the events of Kingdom Hearts. It's not a re-hash, but it's unclear yet how they are able to travel between worlds.

I guess we can rule out the worlds being re-locked for good. ;p