Although I know it'll probably never happen from the factory, I'd love to see Dodge roll out a package that included better handling and some sort of foced induction, possibly a supercharger turning out an easy-going 6-8 pounds of boost. The Hemi's are already cranking out a respectible, naturally aspirated 425hp, so force-feed it some air, adjust the air/fuel mixtures and timing, and create a special low-restriction intake/exhaust system, you would have a Challenger to compete with the GT500's and Corvette's in terms of power. Handling would also need to be addressed, can't make proper use of all that power if you can only go in a straight line with it, now can you? Do some R&D, come up with a competition-minded coil over set up to lower the car's center of gravity a few inches (and possibly with some sort of stiffnes control in terms of the shock like you see on a lot of aftermarket coil over systems, but have it be electronically adjusted to allow for precise tuning), stiffen up the frame, and lighten the load a little bit and you've got a car that will be a sure fan favorite for geneartions. But like I said, probably will never happen.