We're probably not going to get Porsche in GT6 with the evil empire (Electronic Arts) holding the Porsche license hostage. Ferrari, Porsche, and Lamborghini is a dream MANY Gran Turismo fans have hoped for probably since the very first game. I remember all the "butt-hurt fanboys/fangirls" who soiled their diapers just because none of the aforementioned makes were featured in a GT's car lineup. Not many complained now that Ferrari and Lamborghini have shown up in Gran Turismo PSP and GT5. People who played Forza Motorsport 4 knows how it feels to not have Porsche featured (since FM has always featured Porsche in the major FM titles except FM4). Life goes on just because GT may not have Porsche. It would be disappointing, but not too much to where GT6's lineup would be lackluster. Almost as if people [still] think GT's lineup is Nissan Skylines/GT-Rs... and then everything else.
I surely would want to see Porsche in GT6. However, I am not going to petition or riot just because the company isn't featured in GT6. Maybe what will work better for GT would be to enhance and expand upon the likes of RUF and/or Gemballa or any other similar companies.