They will announce guild wars 2 server shutdown and guild wars 1 will resume development as the great experiment failed. They will hire back gaile gray, mike obrien, jeff strain and that other guy. Then they will update all the graphics. Do a full skill rebalance. Add in hardmode in presearing. Add all the god realms. Release an Orr expansion. Open all the prophecies arenas to level 20s and force players to play them. Give us mounts and jump. Add in extra hardmode. Make energy surge ear shot range. Make obsidian armor available in shing jea, ascalon city and kamadan. Make all dyes black dye.
But that's just my speculation to this totally original question.