>>55492903The trailer is that it opens with a concept sketch of what they want Lumiose to look like after renovation. Then it transitions into Pikachu running through a gigantic CG blueprint of the city, with modern people bustling around side-by-side with Pokemon, before returning back to the original sketch.
How I interpreted the trailer is that the area Pikachu is running through is modern Kalos, but the fact that it's displayed as a blueprint means it's still a concept that hasn't happened yet. It's saying "the plot of the game is that you're building what will eventually become all of this".
