It depends on how it looks, but if they have to make it smaller I'm not hopeful. I cannot see an appearance change that would do anything but worsen the looks of the Fifth. It's pretty much perfect lookswise IMHO. By the time the Sixth hits the streets the warranty will be gone so if I want to make it faster, drop weight from it, improve the handling, make it look like new with a new custom paint job, etc. I can do that myself with the money I save from not having a car payment.
I'm hoping the Sixth surprises me, but I'm not holding my breath.