It took me a minute after you said this.Along with this: Apparently rumor has it that this will be one HUGE pokemon game. Since it was codename Rainbow. (Yellow, red, blue, silver, gold, Black, white) Many think that you'll be able to go to other regions. Probably Unova (as said above) or Johto + Kanto. This is just rumor, however.
Also, it seems this region is based off of Hawaii, or some other tropical climate. Also, there are sketches of the player in a vehicle. I assume this will play like Pokemon XD Gale of Darkness, where you will drive to different locations of your region.Sorry for triple post, but I think you might be able to collect almost all pokemon (if you have both games then you will get to collect them all) At the very end of the trailer he says: "It's all coming together!" What does this mean? I think you might be able to travel to different, if not, all the regions. Also the trailer is actually pretty amazing.
https://youtu.be/hmzDL1l3Fag
