I'll attempt to answer your questions.
Supercharger - There is the "rumor" that you will be able to order GM performance upgrades at the time you order your Camaro. I'm not certain a supercharger will be one of them though. If it is not, and you add an aftermarket one, it
could void your warranty.
Window tint - I highly doubt that dealers will offer, or install this.
Top engine offering - Nothing has been decided upon yet. Best "guesstimate" though would be in the 400 to 450 hp range. With possible dealer installed options, higher hp.