Although you are trying to be helpful, you are wrong. There will be way more than just Old Russia in Earth, so in turn, there will be more than 4 explorable zones. Same with Venus, Mars, etc. Also, one raid is highly unlikely. That would be stupid on Bungie's part, and I know that there will be more than just one raid.
There isn't any confirmation of there being anything other than Old Russia though. So your speculation is just as accurate as his speculation. We still don't know much. I just wish Bungie would come out and answer some of this stuff.
Go to Destiny Wiki, it says Old Chicago is only one Zone of Earth. But yes I want Bungie to confirm.
Edited by Skillet98: 7/28/2014 8:57:24 PMIt's almost as if you didn't know that wiki pages can be edited by anyone, and are usually very unreliable sources of information unless they actually cite sources of their own...
Someone else brought something to my attention. Bungie in a twitch stream earlier this week said that there will be-at launch-one zone per planet. I am hoping that they add more but maybe the zones will be bigger than the ones in Beta. I was wrong in this matter but I hope in the future they add other zones.