I managed to find all character models and textures for the main cast, and opened them up in Maya (or 3DSMax; they're in both .max and .obj formats). Each character is around 10,000 triangles which is roughly what most current-gen models are in games (they really get their detail from shaders and normal maps). Kind of amazing they were able to fit all that on a PS2 though.

Hopefully that means it wouldn't take them much effort to bring this port up to current-gen standards. Though that really depends on how many development resources they have to throw at it.

Hopefully we see something at E3 this year? Or have they already said they wouldn't?