It really seems like they are just using the home field endzones, and that is such a letdown. This is what the Broncos have, except for the navy. The Seahawks have been that way for the previous 2, and the Patriots was the same last year, except for the conference logo and navy. I am really curious to see if they make Carolina's similar to the Denver pattern, or just paint the black endzone with "Panthers" in it, like they have in Charlotte.
I HIGHLY doubt they change anything, but it wouldn't be unheard of. I was at Super Bowl XLVII in New Orleans, and on the Media Day that week at the Superdome, the Ravens endzone was in black. However, on gameday, it was purple. Don't know the reasoning, but I do have pictures as proof that it changed.
BTW, I have loved this thread and just signed up, and appreciate everyone's input. Really interesting stuff.