If the Z28 stays true to it's racing roots, it won't have magnetic ride suspension OR a supercharged engine. The 1LE will be a stopgap until the Z28 can be done "properly".
One of the things that sucks about the ZL1 is that since it has magnetic ride suspension, it can't be used in any class of racing.
Z28 needs to have normal racing suspension, less weight, and a naturally aspirated engine that ensures a proper power to weight ratio. Not a gigantic engine shoehorned into an overweight pig either (i.e. 5th gen).