Personally I think shadow could dish it out with his chaos abilities. Julie-Su and rouge would tear eachother apart.
Sonic & Knuckles and shadow would smash eachother up while Amy worked with sonic but eventually gets killed by an off-target knux punch or a misplaced chaos spear or, ironically, a collision between sonic & Amy at like Mach 8.4 or something, leading to a finish by, most likely, knux which leaves him open for a good old roundhouse, at super-sonic-speed, by shadow, upside the head and it's curtains for the rest.

Long isn't it???