Man, I'm trying to think... I knew a guy that had a Berlinetta with a sunroof, but I'm not sure if he installed it or not- probably did. Overall, I believe GM only makes Camaro's & Firebirds with T-Tops or convertibles-- nothing with sunroofs. GM more than likely will not offer a sunroof in the new Camaro; even in the V6's. And if the groove in the roof stays you're def not going to see a sunroof.
As far as T-Tops are concerned, they just don't look right with this particular body design- imo. I think someone did a chop depicting what a Camaro with T-Tops might look like. This render didn't include the b-pillar which consequently affected the way it looked. Engineers would have to reinforce the b-pillars to compensate for the glass tops, causing the rear side windows to appear tiny and awkward looking. Just wouldn't flow...
So I really believe that there will be no sunroofs or t-tops.