More Porsche 991 renderingsWe all know the next generation 911, the 991, is coming. From spyphotos is appears the 991 won't differ drastically from the 997. 911 design is usually evolution, not revolution, and that should hold true. You can see the renderings AutoBild did below. There really is not much difference from the 997 other than the taillights which are more aggressive LED's. The new 911 will be revealed at the Frankfurt Auto Show this year.