It's insane to me how many gamers are sleeping on the Guild Wars franchise.
Arenanet is amazing, not only are they going to support GW2 after they release GW3. They're taking a year to polish the entire game, before resuming expansion development! And they're even making new content for GW1!!
Guild Wars 3 real :)
My prediction is that this is a teaser for Guild Wars 3.
It shows a healed Orr, way in the future. It has healed and flourished again after Trahearne cleansed Orr from Zhaitan's corruption at the end of Guild Wars 2's base story.