huh....I'm actually not looking forwards to this. Now, I'm a big a fan of Cave Story, but I, like many above, find that the original pixel artwork had a charm that isn't going to be beaten by rendered, 3D environments. Although the expansion on the story might be good and worth my time, and who knows the game could be lots of fun (it is Cave Story after all). but I'll reserve my judgment.
It's not like an old game is being updated to 3D graphics, that I have fewer problems with, but this game is from 2004, why would I want it to look like anything other than a retro throwback? That was a HUGE part of the original appeal. Without that charm, I'm far less interested and feel that I will find it lackluster in comparison.