I would suspect that GW2 would include the lands of Kryta, Elona, and Cantha. This is backed by the supposed storyline, or lore of gw2, that the Dragon that woke in the Central Transfer Chamber was just one of many, and with that one waking, they rest were awaken. Additionally, if the storyline of GW2 that I read was correct, then the awakening of these dragons would effect the world, not just kyrta. While it doesn't mention any of the dragon's attacking elona itself, Istan is probably destroyed by these dragons in the same was Lion's Arch and the costal towns of Kryta were. Elona has more problems with the rampaging Palawa Joko destroying Vabbi.
tl;dr: All of Tyria, although everything will either be destroyed or rampaging with undead.
Last edited by kRimag; Dec 08, 2007 at 10:14 PM // 22:14..