Pic's or a reference please.
As recently as January, 2014, this idea was dead.
Instead of a new entry level roadster, I say look for a mini-Panamera based on the Macan. This would give Porsche a BMW 3/5 series fighter which is a huge segment with high payoff.
http://www.autonews.com/article/20140113/BLOG06/140119838/porsche-nixes-entry-level-roadster-small-crossover