[UPDATE] Sorry about the delay; I've had too much work/school/Batman lately to update the post. Here you go.
Today is the big day, children. Rockstar is set to unveil GTA V's trailer, giving us an insight into the newest city they're creating. A lot of people are saying a revisit to San Andreas/Los Santos (LA). I still say DC, with proof in the logo they revealed last week.
I'll update this post with a link to the trailer once it hits the web.