I have no idea if this has been mentioned in this thread before but yolo
anyway i came across this video on youtube: http://www.youtube.com/watch?v=MChQfBdjMV8
and he says he wants character customization (tbh I have never even thought of this before and he's like 'many pokemon fans have wanted this' #oops) - but then he mentions the character looking into the mirror, and the sunglasses being removed in different gameplay seems plausible character customization might appear - although I understand that it might not appear, or be very limited.
I think character customizations is completely plausible. They have been quiet about a lot of things for this release, but the fact that they haven't given another video that shows the character implies that they are hiding something. I bet you anything that the next time they show the characters, they are going to look completely different. I'm not expecting the customization to be huge, but I could see it being on Harvest Moon A New Beginning's level, where it's just clothes, skin, and hair.